our existing cash flow hedges are highly effective and there is no current impact on earnings due to hedge ineffectiveness . it is our policy to execute such instruments with credit-worthy banks and not to enter into derivative financial instruments for speculative purposes . contractual obligations fis 2019s long-term contractual obligations generally include its long-term debt and operating lease payments on certain of its property and equipment . the following table summarizes fis 2019s significant contractual obligations and commitments as of december 31 , 2007 ( in thousands ) : .

Table:
 | 2008 | 2009 | 2010 | 2011 | 2012 | thereafter | total
long-term debt | $ 272014 | $ 142850 | $ 226000 | $ 173500 | $ 1945033 | $ 1516000 | $ 4275397
interest | 254716 | 238554 | 227320 | 218416 | 109226 | 101987 | 1150219
operating leases | 83382 | 63060 | 35269 | 21598 | 14860 | 30869 | 249038
investment commitments | 47514 | 2014 | 2014 | 2014 | 2014 | 2014 | 47514
purchase commitments | 33264 | 2014 | 2014 | 2014 | 2014 | 2014 | 33264
data processing and maintenance commitments | 198290 | 171411 | 107105 | 63010 | 61035 | 287479 | 888330
total | $ 889180 | $ 615875 | $ 595694 | $ 476524 | $ 2130154 | $ 1936335 | $ 6643762
off-balance sheet arrangements fis does not have any material off-balance sheet arrangements other than operating leases .
escrow arrangements in conducting our title agency , closing and 1031 exchange services operations , we routinely hold customers 2019 assets in escrow , pending completion of real estate transactions .
certain of these amounts are maintained in segregated bank accounts and have not been included in the accompanying consolidated balance sheets .
we have a contingent liability relating to proper disposition of these balances , which amounted to $ 1926.8 million at december 31 , 2007 .
as a result of holding these customers 2019 assets in escrow , we have ongoing programs for realizing economic benefits during the year through favorable borrowing and vendor arrangements with various banks .
there were no loans outstanding as of december 31 , 2007 and these balances were invested in short term , high grade investments that minimize the risk to principal .
recent accounting pronouncements in december 2007 , the fasb issued sfas no .
141 ( revised 2007 ) , business combinations ( 201csfas 141 ( r ) 201d ) , requiring an acquirer in a business combination to recognize the assets acquired , the liabilities assumed , and any noncontrolling interest in the acquiree at their fair values at the acquisition date , with limited exceptions .
the costs of the acquisition and any related restructuring costs will be recognized separately .
assets and liabilities arising from contingencies in a business combination are to be recognized at their fair value at the acquisition date and adjusted prospectively as new information becomes available .
when the fair value of assets acquired exceeds the fair value of consideration transferred plus any noncontrolling interest in the acquiree , the excess will be recognized as a gain .
under sfas 141 ( r ) , all business combinations will be accounted for by applying the acquisition method , including combinations among mutual entities and combinations by contract alone .
sfas 141 ( r ) applies prospectively to business combinations for which the acquisition date is on or after the first annual reporting period beginning on or after december 15 , 2008 , is effective for periods beginning on or after december 15 , 2008 , and will apply to business combinations occurring after the effective date .
management is currently evaluating the impact of this statement on our statements of financial position and operations .
in december 2007 , the fasb issued sfas no .
160 , noncontrolling interests in consolidated financial statements 2014 an amendment of arb no .
51 ( 201csfas 160 201d ) , requiring noncontrolling interests ( sometimes called minority interests ) to be presented as a component of equity on the balance sheet .
sfas 160 also requires that the amount of net income attributable to the parent and to the noncontrolling interests be clearly identified and presented on the face of the consolidated statement of income .
this statement eliminates the need to apply purchase .

Question: what percentage of total significant contractual obligations and commitments as of december 31 , 2007 are is interest?
Answer: 17%
Calculation: divide(1150219, 6643762)