## Table 0 ##
(1) Includes the results of operations of: (i) Rhiag, from its acquisition effective March 18, 2016; (ii) PGW, from its acquisition effective April 21, 2016; and (iii) 13 other businesses from their respective acquisition dates in 2016.
(2) Includes the results of operations of 18 businesses from their respective acquisition dates in 2015.
(3) Includes the results of operations of Keystone Specialty from its acquisition effective January 3, 2014 and 22 other businesses from their respective acquisition dates in 2014.
(4) Includes the results of operations of Sator from its acquisition effective May 1, 2013 and 19 other businesses from their respective acquisition dates in 2013.
(5) Includes the results of operations of 30 businesses from their respective acquisition dates in 2012.
Our 2012 results include gains totaling $17.9 million, which are included in Cost of goods sold, resulting from lawsuit settlements with certain of our aftermarket product suppliers.
(6) The sum of the individual earnings per share amounts may not equal the total due to rounding.
(7) Prior year balances have been updated to reflect the adjustments resulting from the retrospective adoption of ASU 2016-09 during 2016 as described in Recent Accounting Pronouncements within Note 4, "Summary of Significant Accounting Policies" in Part II, Item 8 of this Annual Report on Form 10-K.
The adjustments to prior year amounts are reflected in the table below:
## Table 1 ##
(8) Working capital amounts exclude assets and liabilities of discontinued operations.
2015, compared to $775.9 million for business acquisitions in 2014, which included $427.1 million for our Keystone Specialty acquisition.
Property and equipment purchases were $170.5 million in the year ended December 31, 2015 compared to $141.0 million in the prior year.
The increase in capital expenditures relative to the prior year period reflects an increase of $33.0 million in our U. K.  operations primarily due to costs incurred to develop and equip a new distribution center.
During 2015, cash provided by other investing activities, net was $10.7 million and primarily consisted of proceeds from disposals of fixed assets totaling $10.7 million, partially offset by payments of $9.7 million for investments in unconsolidated subsidiaries, including a $7.5 million payment to increase our investment in ACM Parts.
During 2014, we paid $2.2 million for investments in unconsolidated subsidiaries.
Net cash provided by financing activities totaled $238.5 million for the year ended December 31, 2015, compared to $501.2 million in 2014.
During 2015, net repayments under our credit facilities were $186.5 million compared to net borrowings of $578.4 million in 2014.
Compared to the prior year period, our cash investment in acquisitions was lower, and therefore, we used the excess cash generated by operations to repay outstanding amounts under our revolving credit facilities.
During 2014, we used the proceeds from the net borrowings primarily to fund acquisitions, including $370 million of revolver borrowings and $80 million of borrowings under our receivables facility to finance the Keystone Specialty acquisition.
Our March 2014 amendment of our credit facilities generated $11.3 million in additional term loan borrowings, which were used to pay $3.7 million in debt issuance costs related to the amendment, as well as to repay outstanding revolver borrowings.
During 2014, we made a payment of $44.8 million ($39.5 million included in financing cash flows and $5.3 million included in operating cash flows) for the final earnout period under the contingent payment agreement related to our 2011 ECP acquisition.
Cash generated from exercises of stock options provided $8.2 million and $9.3 million in the years ended December 31, 2015 and 2014, respectively.
The excess tax benefit from share-based payment arrangements reduced income taxes payable by $14.4 million and $17.8 million in the years ended December 31, 2015 and 2014, respectively.
We paid $7.6 million and $0.4 million related to taxes for net share settlements of stock-based compensation in the years ended December 31, 2015 and 2014, respectively.
During the year ended December 31, 2014, we paid $12.6 million related to the settlement of foreign currency forward contracts; no such payment occurred in 2015.
Off-Balance Sheet Arrangements and Future Commitments We do not have any off-balance sheet arrangements or undisclosed borrowings or debt that would be required to be disclosed pursuant to Item 303 of Regulation S-K under the Securities Exchange Act of 1934.
Additionally, we do not have any synthetic leases.
The following table represents our future commitments under contractual obligations as of December 31, 2016 (in millions):
## Table 2 ##
Note: This table only includes amounts related to continuing operations.
(1) Our long-term debt under contractual obligations above includes interest of $546.0 million on the balances outstanding as of December 31, 2016.
The long-term debt balance excludes debt issuances costs as these expenses have already been paid.
Interest on our senior notes, notes payable, and other long-term debt is calculated based on the respective stated rates.
Interest on our variable rate credit facilities is calculated based on the weighted average rates, including the impact of interest rate swaps through their respective expiration dates, in effect for each tranche of borrowings as of December 31, 2016.
Future estimated interest expense for the next year, one to three years, and three to five years is $102.1 million, $201.0 million and $156.4 million, respectively.
Estimated interest expense beyond five years is $86.5 million.
(2) Interest on capital lease obligations of $10.6 million is included based on incremental borrowing or implied rates.
Future estimated interest expense for the next year, one to three years, and three to five years is $0.4 million, $0.7 million and $0.6 million, respectively.
Estimated interest expense beyond five years is $8.9 million.
The fair value measurements of the borrowings under our credit agreement and receivables facility are classified as Level 2 within the fair value hierarchy since they are determined based upon significant inputs observable in the market, including interest rates on recent financing transactions with similar terms and maturities.
We estimated the fair value by calculating the upfront cash payment a market participant would require at December 31, 2016 to assume these obligations.
The fair value of our Notes is classified as Level 1 within the fair value hierarchy since it is determined based upon observable market inputs including quoted market prices in an active market.
The fair value of our Euro Notes is determined based upon observable market inputs including quoted market prices in a market that is not active, and therefore is classified as Level 2 within the fair value hierarchy.
Note 12.
Commitments and Contingencies Operating Leases We are obligated under noncancelable operating leases for corporate office space, warehouse and distribution facilities, trucks and certain equipment.
The future minimum lease commitments under these leases at December 31, 2016 are as follows (in thousands):
## Table 3 ##
Rental expense for operating leases was approximately $211.5 million, $168.4 million and $148.5 million during the years ended December 31, 2016, 2015 and 2014, respectively.
We guarantee the residual values of the majority of our truck and equipment operating leases.
The residual values decline over the lease terms to a defined percentage of original cost.
In the event the lessor does not realize the residual value when a piece of equipment is sold, we would be responsible for a portion of the shortfall.
Similarly, if the lessor realizes more than the residual value when a piece of equipment is sold, we would be paid the amount realized over the residual value.
Had we terminated all of our operating leases subject to these guarantees at December 31, 2016, our portion of the guaranteed residual value would have totaled approximately $59.0 million.
We have not recorded a liability for the guaranteed residual value of equipment under operating leases as the recovery on disposition of the equipment under the leases is expected to approximate the guaranteed residual value.
Litigation and Related Contingencies We have certain contingencies resulting from litigation, claims and other commitments and are subject to a variety of environmental and pollution control laws and regulations incident to the ordinary course of business.
We currently expect that the resolution of such contingencies will not materially affect our financial position, results of operations or cash flows.

Tables referenced above, in order (Table 0 first):
<table><tr><td></td><td colspan="5">Year Ended December 31,</td></tr><tr><td>(in thousands)</td><td>2016</td><td>2015</td><td>2014</td><td>2013</td><td>2012</td></tr><tr><td></td><td>-1</td><td>-2</td><td>-3</td><td>-4</td><td>-5</td></tr><tr><td>Other Financial Data:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net cash provided by operating activities<sup>-7</sup></td><td>$635,014</td><td>$544,282</td><td>$388,711</td><td>$446,404</td><td>$221,927</td></tr><tr><td>Net cash used in investing activities</td><td>-1,709,928</td><td>-329,993</td><td>-920,994</td><td>-505,606</td><td>-352,534</td></tr><tr><td>Net cash (used in) provided by financing activities<sup>(7)</sup></td><td>1,225,737</td><td>-238,537</td><td>501,189</td><td>147,593</td><td>141,335</td></tr><tr><td>Capital expenditures</td><td>207,074</td><td>170,490</td><td>140,950</td><td>90,186</td><td>88,255</td></tr><tr><td>Cash paid for acquisitions, net of cash acquired</td><td>1,349,339</td><td>160,517</td><td>775,921</td><td>408,384</td><td>265,336</td></tr><tr><td>Depreciation and amortization</td><td>206,086</td><td>128,192</td><td>125,437</td><td>86,463</td><td>70,165</td></tr><tr><td>Balance Sheet Data:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total assets</td><td>$8,303,199</td><td>$5,647,837</td><td>$5,475,739</td><td>$4,438,058</td><td>$3,664,503</td></tr><tr><td>Working capital<sup>-8</sup></td><td>2,045,273</td><td>1,588,742</td><td>1,491,169</td><td>1,062,926</td><td>843,689</td></tr><tr><td>Long-term obligations, including current portion</td><td>3,341,771</td><td>1,584,702</td><td>1,846,148</td><td>1,287,242</td><td>1,111,058</td></tr><tr><td>Stockholders' equity</td><td>3,442,949</td><td>3,114,682</td><td>2,720,657</td><td>2,350,745</td><td>1,964,094</td></tr></table>
<table><tr><td></td><td colspan="4">Year Ended December 31,</td></tr><tr><td></td><td>2015</td><td>2014</td><td>2013</td><td>2012</td></tr><tr><td>Net cash provided by operating activities</td><td></td><td></td><td></td><td></td></tr><tr><td>Prior to adoption of ASU 2016-09</td><td>$529,837</td><td>$370,897</td><td>$428,056</td><td>$206,190</td></tr><tr><td>Adjustment - adoption of ASU 2016-09</td><td>14,445</td><td>17,814</td><td>18,348</td><td>15,737</td></tr><tr><td>As adjusted</td><td>$544,282</td><td>$388,711</td><td>$446,404</td><td>$221,927</td></tr><tr><td>Net cash (used in) provided by financing activities</td><td></td><td></td><td></td><td></td></tr><tr><td>Prior to adoption of ASU 2016-09</td><td>$-224,092</td><td>$519,003</td><td>$165,941</td><td>$157,072</td></tr><tr><td>Adjustment - adoption of ASU 2016-09</td><td>-14,445</td><td>-17,814</td><td>-18,348</td><td>-15,737</td></tr><tr><td>As adjusted</td><td>$-238,537</td><td>$501,189</td><td>$147,593</td><td>$141,335</td></tr></table>
<table><tr><td></td><td>Total</td><td>Less than1 Year</td><td>1-3 Years</td><td>3-5 Years</td><td>More than5 Years</td></tr><tr><td>Contractual obligations</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Long-term debt<sup>-1</sup></td><td>$3,897.5</td><td>$166.5</td><td>$380.0</td><td>$2,136.5</td><td>$1,214.5</td></tr><tr><td>Capital lease obligations<sup>-2</sup></td><td>24.8</td><td>4.5</td><td>4.9</td><td>2.2</td><td>13.2</td></tr><tr><td>Operating leases<sup>-3</sup></td><td>1,184.6</td><td>200.4</td><td>305.4</td><td>192.6</td><td>486.2</td></tr><tr><td>Purchase obligations<sup>-4</sup></td><td>344.8</td><td>342.5</td><td>1.9</td><td>0.4</td><td>—</td></tr><tr><td>Other long-term obligations<sup>-5</sup></td><td>247.9</td><td>142.1</td><td>49.3</td><td>14.1</td><td>42.4</td></tr><tr><td>Total</td><td>$5,699.6</td><td>$856.0</td><td>$741.5</td><td>$2,345.8</td><td>$1,756.3</td></tr></table>
<table><tr><td>2017</td><td>$200,450</td></tr><tr><td>2018</td><td>168,926</td></tr><tr><td>2019</td><td>136,462</td></tr><tr><td>2020</td><td>110,063</td></tr><tr><td>2021</td><td>82,494</td></tr><tr><td>Thereafter</td><td>486,199</td></tr><tr><td>Future Minimum Lease Payments</td><td>$1,184,594</td></tr></table>

Question: what was the percentage change in rental expense for operating leases from 2015 to 2016?
Answer: 0.25594
Reasoning program: subtract(211.5,168.4), divide(#0,168.4)