table of contents interest expense , net of capitalized interest increased $ 64 million , or 9.8% ( 9.8 % ) , to $ 710 million in 2013 from $ 646 million in 2012 primarily due to special charges of $ 92 million to recognize post-petition interest expense on unsecured obligations pursuant to the plan and penalty interest related to 10.5% ( 10.5 % ) secured notes and 7.50% ( 7.50 % ) senior secured notes . other nonoperating expense , net of $ 84 million in 2013 consists principally of net foreign currency losses of $ 55 million and early debt extinguishment charges of $ 48 million . other nonoperating income in 2012 consisted principally of a $ 280 million special credit related to the settlement of a commercial dispute partially offset by net foreign currency losses . reorganization items , net reorganization items refer to revenues , expenses ( including professional fees ) , realized gains and losses and provisions for losses that are realized or incurred as a direct result of the chapter 11 cases . the following table summarizes the components included in reorganization items , net on american 2019s consolidated statements of operations for the years ended december 31 , 2013 and 2012 ( in millions ) : .

Table: 2013 2012 pension and postretirement benefits $ 2014 $ -66 ( 66 ) labor-related deemed claim ( 1 ) 1733 2014 aircraft and facility financing renegotiations and rejections ( 2 ) ( 3 ) 320 1951 fair value of conversion discount ( 4 ) 218 2014 professional fees 199 227 other 170 67 total reorganization items net $ 2640 $ 2179

( 1 ) in exchange for employees 2019 contributions to the successful reorganization , including agreeing to reductions in pay and benefits , american agreed in the plan to provide each employee group a deemed claim , which was used to provide a distribution of a portion of the equity of the reorganized entity to those employees . each employee group received a deemed claim amount based upon a portion of the value of cost savings provided by that group through reductions to pay and benefits as well as through certain work rule changes . the total value of this deemed claim was approximately $ 1.7 billion . ( 2 ) amounts include allowed claims ( claims approved by the bankruptcy court ) and estimated allowed claims relating to ( i ) the rejection or modification of financings related to aircraft and ( ii ) entry of orders treated as unsecured claims with respect to facility agreements supporting certain issuances of special facility revenue bonds . the debtors recorded an estimated claim associated with the rejection or modification of a financing or facility agreement when the applicable motion was filed with the bankruptcy court to reject or modify such financing or facility agreement and the debtors believed that it was probable the motion would be approved , and there was sufficient information to estimate the claim . see note 2 to american 2019s consolidated financial statements in part ii , item 8b for further information . ( 3 ) pursuant to the plan , the debtors agreed to allow certain post-petition unsecured claims on obligations . as a result , during the year ended december 31 , 2013 , american recorded reorganization charges to adjust estimated allowed claim amounts previously recorded on rejected special facility revenue bonds of $ 180 million , allowed general unsecured claims related to the 1990 and 1994 series of special facility revenue bonds that financed certain improvements at jfk , and rejected bonds that financed certain improvements at ord , which are included in the table above . ( 4 ) the plan allowed unsecured creditors receiving aag series a preferred stock a conversion discount of 3.5% ( 3.5 % ) . accordingly , american recorded the fair value of such discount upon the confirmation of the plan by the bankruptcy court. .

Question: by how much did aircraft and facility financing renegotiations and rejections decrease from 2012 to 2013?
Answer: -83.6%
Calculation: divide(subtract(320, 1951), 1951)