Financial report context:
new term loan a facility , with the remaining unpaid principal amount of loans under the new term loan a facility due and payable in full at maturity on june 6 , 2021 . principal amounts outstanding under the new revolving loan facility are due and payable in full at maturity on june 6 , 2021 , subject to earlier repayment pursuant to the springing maturity date described above . in addition to paying interest on outstanding principal under the borrowings , we are obligated to pay a quarterly commitment fee at a rate determined by reference to a total leverage ratio , with a maximum commitment fee of 40% ( 40 % ) of the applicable margin for eurocurrency loans . in july 2016 , breakaway four , ltd. , as borrower , and nclc , as guarantor , entered into a supplemental agreement , which amended the breakaway four loan to , among other things , increase the aggregate principal amount of commitments under the multi-draw term loan credit facility from 20ac590.5 million to 20ac729.9 million . in june 2016 , we took delivery of seven seas explorer . to finance the payment due upon delivery , we had export credit financing in place for 80% ( 80 % ) of the contract price . the associated $ 373.6 million term loan bears interest at 3.43% ( 3.43 % ) with a maturity date of june 30 , 2028 . principal and interest payments shall be paid semiannually . in december 2016 , nclc issued $ 700.0 million aggregate principal amount of 4.750% ( 4.750 % ) senior unsecured notes due december 2021 ( the 201cnotes 201d ) in a private offering ( the 201coffering 201d ) at par . nclc used the net proceeds from the offering , after deducting the initial purchasers 2019 discount and estimated fees and expenses , together with cash on hand , to purchase its outstanding 5.25% ( 5.25 % ) senior notes due 2019 having an aggregate outstanding principal amount of $ 680 million . the redemption of the 5.25% ( 5.25 % ) senior notes due 2019 was completed in january 2017 . nclc will pay interest on the notes at 4.750% ( 4.750 % ) per annum , semiannually on june 15 and december 15 of each year , commencing on june 15 , 2017 , to holders of record at the close of business on the immediately preceding june 1 and december 1 , respectively . nclc may redeem the notes , in whole or part , at any time prior to december 15 , 2018 , at a price equal to 100% ( 100 % ) of the principal amount of the notes redeemed plus accrued and unpaid interest to , but not including , the redemption date and a 201cmake-whole premium . 201d nclc may redeem the notes , in whole or in part , on or after december 15 , 2018 , at the redemption prices set forth in the indenture governing the notes . at any time ( which may be more than once ) on or prior to december 15 , 2018 , nclc may choose to redeem up to 40% ( 40 % ) of the aggregate principal amount of the notes at a redemption price equal to 104.750% ( 104.750 % ) of the face amount thereof with an amount equal to the net proceeds of one or more equity offerings , so long as at least 60% ( 60 % ) of the aggregate principal amount of the notes issued remains outstanding following such redemption . the indenture governing the notes contains covenants that limit nclc 2019s ability ( and its restricted subsidiaries 2019 ability ) to , among other things : ( i ) incur or guarantee additional indebtedness or issue certain preferred shares ; ( ii ) pay dividends and make certain other restricted payments ; ( iii ) create restrictions on the payment of dividends or other distributions to nclc from its restricted subsidiaries ; ( iv ) create liens on certain assets to secure debt ; ( v ) make certain investments ; ( vi ) engage in transactions with affiliates ; ( vii ) engage in sales of assets and subsidiary stock ; and ( viii ) transfer all or substantially all of its assets or enter into merger or consolidation transactions . the indenture governing the notes also provides for events of default , which , if any of them occurs , would permit or require the principal , premium ( if any ) , interest and other monetary obligations on all of the then-outstanding notes to become due and payable immediately . interest expense , net for the year ended december 31 , 2016 was $ 276.9 million which included $ 34.7 million of amortization of deferred financing fees and a $ 27.7 million loss on extinguishment of debt . interest expense , net for the year ended december 31 , 2015 was $ 221.9 million which included $ 36.7 million of amortization of deferred financing fees and a $ 12.7 million loss on extinguishment of debt . interest expense , net for the year ended december 31 , 2014 was $ 151.8 million which included $ 32.3 million of amortization of deferred financing fees and $ 15.4 million of expenses related to financing transactions in connection with the acquisition of prestige . certain of our debt agreements contain covenants that , among other things , require us to maintain a minimum level of liquidity , as well as limit our net funded debt-to-capital ratio , maintain certain other ratios and restrict our ability to pay dividends . substantially all of our ships and other property and equipment are pledged as collateral for certain of our debt . we believe we were in compliance with these covenants as of december 31 , 2016 . the following are scheduled principal repayments on long-term debt including capital lease obligations as of december 31 , 2016 for each of the next five years ( in thousands ) : .

Financial table:
year: 2017; amount: $ 560193
year: 2018; amount: 554846
year: 2019; amount: 561687
year: 2020; amount: 1153733
year: 2021; amount: 2193823
year: thereafter; amount: 1490322
year: total; amount: $ 6514604

Additional report context:
we had an accrued interest liability of $ 32.5 million and $ 34.2 million as of december 31 , 2016 and 2015 , respectively. .

Question: what is the percentage change in interest expense-net , from 2015 to 2016?
Answer: 24.8%