what was the percent of the total interest on long-term debt to the total contractual cash obligations
a summary of the company 2019s significant contractual obligations as of december 31 , 2015 , follows : contractual obligations .

|  |  | Payments due by year |
| :--- | :--- | :--- |
| (Millions) | Total | 2016 | 2017 | 2018 | 2019 | 2020 | After 2020 |
| Long-term debt, including current portion (Note 10) | $9,878 | $1,125 | $744 | $993 | $622 | $1,203 | $5,191 |
| Interest on long-term debt | 2,244 | 174 | 157 | 153 | 149 | 146 | 1,465 |
| Operating leases (Note 14) | 943 | 234 | 191 | 134 | 86 | 72 | 226 |
| Capital leases (Note 14) | 59 | 11 | 6 | 4 | 3 | 3 | 32 |
| Unconditional purchase obligations and other | 1,631 | 1,228 | 160 | 102 | 54 | 56 | 31 |
| Total contractual cash obligations | $14,755 | $2,772 | $1,258 | $1,386 | $914 | $1,480 | $6,945 |

long-term debt payments due in 2016 and 2017 include floating rate notes totaling $ 126 million ( classified as current portion of long-term debt ) , and $ 96 million ( included as a separate floating rate note in the long-term debt table ) , respectively , as a result of put provisions associated with these debt instruments . interest projections on both floating and fixed rate long-term debt , including the effects of interest rate swaps , are based on effective interest rates as of december 31 , 2015 . unconditional purchase obligations are defined as an agreement to purchase goods or services that is enforceable and legally binding on the company . included in the unconditional purchase obligations category above are certain obligations related to take or pay contracts , capital commitments , service agreements and utilities . these estimates include both unconditional purchase obligations with terms in excess of one year and normal ongoing purchase obligations with terms of less than one year . many of these commitments relate to take or pay contracts , in which 3m guarantees payment to ensure availability of products or services that are sold to customers . the company expects to receive consideration ( products or services ) for these unconditional purchase obligations . contractual capital commitments are included in the preceding table , but these commitments represent a small part of the company 2019s expected capital spending in 2016 and beyond . the purchase obligation amounts do not represent the entire anticipated purchases in the future , but represent only those items for which the company is contractually obligated . the majority of 3m 2019s products and services are purchased as needed , with no unconditional commitment . for this reason , these amounts will not provide a reliable indicator of the company 2019s expected future cash outflows on a stand-alone basis . other obligations , included in the preceding table within the caption entitled 201cunconditional purchase obligations and other , 201d include the current portion of the liability for uncertain tax positions under asc 740 , which is expected to be paid out in cash in the next 12 months . the company is not able to reasonably estimate the timing of the long-term payments or the amount by which the liability will increase or decrease over time ; therefore , the long-term portion of the net tax liability of $ 208 million is excluded from the preceding table . refer to note 8 for further details . as discussed in note 11 , the company does not have a required minimum cash pension contribution obligation for its u.s . plans in 2016 and company contributions to its u.s . and international pension plans are expected to be largely discretionary in future years ; therefore , amounts related to these plans are not included in the preceding table . financial instruments the company enters into foreign exchange forward contracts , options and swaps to hedge against the effect of exchange rate fluctuations on cash flows denominated in foreign currencies and certain intercompany financing transactions . the company manages interest rate risks using a mix of fixed and floating rate debt . to help manage borrowing costs , the company may enter into interest rate swaps . under these arrangements , the company agrees to exchange , at specified intervals , the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount . the company manages commodity price risks through negotiated supply contracts , price protection agreements and forward contracts. .

percent_long_term_debt = 2244 / 14755
answer = percent_long_term_debt * 100