24 | 2018 emerson annual report 2017 vs . 2016 2013 commercial & residential solutions sales were $ 5.9 billion in 2017 , an increase of $ 302 million , or 5 percent , reflecting favorable conditions in hvac and refrigeration markets in the u.s. , asia and europe , as well as u.s . and asian construction markets . underlying sales increased 5 percent ( $ 297 million ) on 6 percent higher volume , partially offset by 1 percent lower price . foreign currency translation deducted $ 20 million and acquisitions added $ 25 million . climate technologies sales were $ 4.2 billion in 2017 , an increase of $ 268 million , or 7 percent . global air conditioning sales were solid , led by strength in the u.s . and asia and robust growth in china partially due to easier comparisons , while sales were up modestly in europe and declined moderately in middle east/africa . global refrigeration sales were strong , reflecting robust growth in china on increased adoption of energy- efficient solutions and slight growth in the u.s . sensors and solutions had strong growth , while temperature controls was up modestly . tools & home products sales were $ 1.6 billion in 2017 , up $ 34 million compared to the prior year . professional tools had strong growth on favorable demand from oil and gas customers and in other construction-related markets . wet/dry vacuums sales were up moderately as favorable conditions continued in u.s . construction markets . food waste disposers increased slightly , while the storage business declined moderately . overall , underlying sales increased 3 percent in the u.s. , 4 percent in europe and 17 percent in asia ( china up 27 percent ) . sales increased 3 percent in latin america and 4 percent in canada , while sales decreased 5 percent in middle east/africa . earnings were $ 1.4 billion , an increase of $ 72 million driven by climate technologies , while margin was flat . increased volume and resulting leverage , savings from cost reduction actions , and lower customer accommodation costs of $ 16 million were largely offset by higher materials costs , lower price and unfavorable product mix . financial position , capital resources and liquidity the company continues to generate substantial cash from operations and has the resources available to reinvest for growth in existing businesses , pursue strategic acquisitions and manage its capital structure on a short- and long-term basis . cash flow from continuing operations ( dollars in millions ) 2016 2017 2018 .

Table:
( dollars in millions ) | 2016 | 2017 | 2018
operating cash flow | $ 2499 | 2690 | 2892
percent of sales | 17.2% ( 17.2 % ) | 17.6% ( 17.6 % ) | 16.6% ( 16.6 % )
capital expenditures | $ 447 | 476 | 617
percent of sales | 3.1% ( 3.1 % ) | 3.1% ( 3.1 % ) | 3.5% ( 3.5 % )
free cash flow ( operating cash flow less capital expenditures ) | $ 2052 | 2214 | 2275
percent of sales | 14.1% ( 14.1 % ) | 14.5% ( 14.5 % ) | 13.1% ( 13.1 % )
operating working capital | $ 755 | 1007 | 985
percent of sales | 5.2% ( 5.2 % ) | 6.6% ( 6.6 % ) | 5.7% ( 5.7 % )
operating cash flow from continuing operations for 2018 was $ 2.9 billion , a $ 202 million , or 8 percent increase compared with 2017 , primarily due to higher earnings , partially offset by an increase in working capital investment to support higher levels of sales activity and income taxes paid on the residential storage divestiture .
operating cash flow from continuing operations of $ 2.7 billion in 2017 increased 8 percent compared to $ 2.5 billion in 2016 , reflecting higher earnings and favorable changes in working capital .
at september 30 , 2018 , operating working capital as a percent of sales was 5.7 percent compared with 6.6 percent in 2017 and 5.2 percent in 2016 .
the increase in 2017 was due to higher levels of working capital in the acquired valves & controls business .
operating cash flow from continuing operations funded capital expenditures of $ 617 million , dividends of $ 1.2 billion , and common stock purchases of $ 1.0 billion .
in 2018 , the company repatriated $ 1.4 billion of cash held by non-u.s .
subsidiaries , which was part of the company 2019s previously announced plans .
these funds along with increased short-term borrowings and divestiture proceeds supported acquisitions of $ 2.2 billion .
contributions to pension plans were $ 61 million in 2018 , $ 45 million in 2017 and $ 66 million in 2016 .
capital expenditures related to continuing operations were $ 617 million , $ 476 million and $ 447 million in 2018 , 2017 and 2016 , respectively .
free cash flow from continuing operations ( operating cash flow less capital expenditures ) was $ 2.3 billion in 2018 , up 3 percent .
free cash flow was $ 2.2 billion in 2017 , compared with $ 2.1 billion in 2016 .
the company is targeting capital spending of approximately $ 650 million in 2019 .
net cash paid in connection with acquisitions was $ 2.2 billion , $ 3.0 billion and $ 132 million in 2018 , 2017 and 2016 , respectively .
proceeds from divestitures not classified as discontinued operations were $ 201 million and $ 39 million in 2018 and 2017 , respectively .
dividends were $ 1.2 billion ( $ 1.94 per share ) in 2018 , compared with $ 1.2 billion ( $ 1.92 per share ) in 2017 and $ 1.2 billion ( $ 1.90 per share ) in 2016 .
in november 2018 , the board of directors voted to increase the quarterly cash dividend 1 percent , to an annualized rate of $ 1.96 per share .
purchases of emerson common stock totaled $ 1.0 billion , $ 400 million and $ 601 million in 2018 , 2017 and 2016 , respectively , at average per share prices of $ 66.25 , $ 60.51 and $ 48.11 .
the board of directors authorized the purchase of up to 70 million common shares in november 2015 , and 41.8 million shares remain available for purchase under this authorization .
the company purchased 15.1 million shares in 2018 , 6.6 million shares in 2017 , and 12.5 million shares in 2016 under this authorization and the remainder of the may 2013 authorization. .

Question: what was the change as a percent of sales in operating cash flow between 2016 and 2018?
Answer: -0.6%
Calculation: subtract(16.6%, 17.2%)