{"pre_text": ["the significant changes from december 31 , 2008 to december 31 , 2009 in level 3 assets and liabilities are due to : a net decrease in trading securities of $ 10.8 billion that was driven by : 2022 net transfers of $ 6.5 billion , due mainly to the transfer of debt 2013 securities from level 3 to level 2 due to increased liquidity and pricing transparency ; and net settlements of $ 5.8 billion , due primarily to the liquidations of 2013 subprime securities of $ 4.1 billion .", "the change in net trading derivatives driven by : 2022 a net loss of $ 4.9 billion relating to complex derivative contracts , 2013 such as those linked to credit , equity and commodity exposures .", "these losses include both realized and unrealized losses during 2009 and are partially offset by gains recognized in instruments that have been classified in levels 1 and 2 ; and net increase in derivative assets of $ 4.3 billion , which includes cash 2013 settlements of derivative contracts in an unrealized loss position , notably those linked to subprime exposures .", "the decrease in level 3 investments of $ 6.9 billion primarily 2022 resulted from : a reduction of $ 5.0 billion , due mainly to paydowns on debt 2013 securities and sales of private equity investments ; the net transfer of investment securities from level 3 to level 2 2013 of $ 1.5 billion , due to increased availability of observable pricing inputs ; and net losses recognized of $ 0.4 billion due mainly to losses on non- 2013 marketable equity securities including write-downs on private equity investments .", "the decrease in securities sold under agreements to repurchase of 2022 $ 9.1 billion is driven by a $ 8.6 billion net transfers from level 3 to level 2 as effective maturity dates on structured repos have shortened .", "the decrease in long-term debt of $ 1.5 billion is driven mainly by 2022 $ 1.3 billion of net terminations of structured notes .", "transfers between level 1 and level 2 of the fair value hierarchy the company did not have any significant transfers of assets or liabilities between levels 1 and 2 of the fair value hierarchy during 2010 .", "items measured at fair value on a nonrecurring basis certain assets and liabilities are measured at fair value on a nonrecurring basis and therefore are not included in the tables above .", "these include assets measured at cost that have been written down to fair value during the periods as a result of an impairment .", "in addition , these assets include loans held-for-sale that are measured at locom that were recognized at fair value below cost at the end of the period .", "the fair value of loans measured on a locom basis is determined where possible using quoted secondary-market prices .", "such loans are generally classified as level 2 of the fair value hierarchy given the level of activity in the market and the frequency of available quotes .", "if no such quoted price exists , the fair value of a loan is determined using quoted prices for a similar asset or assets , adjusted for the specific attributes of that loan .", "the following table presents all loans held-for-sale that are carried at locom as of december 31 , 2010 and 2009 : in billions of dollars aggregate cost fair value level 2 level 3 ."], "post_text": ["."], "table": [["in billions of dollars", "aggregate cost", "fair value", "level 2", "level 3"], ["december 31 2010", "$ 3.1", "$ 2.5", "$ 0.7", "$ 1.8"], ["december 31 2009", "$ 2.5", "$ 1.6", "$ 0.3", "$ 1.3"]], "table_ori": [["In billions of dollars", "Aggregate cost", "Fair value", "Level 2", "Level 3"], ["December 31, 2010", "$3.1", "$2.5", "$0.7", "$1.8"], ["December 31, 2009", "$2.5", "$1.6", "$0.3", "$1.3"]]}

Question: what is the difference in billions of all loans held-for-sale that are carried at locom level 3 between 2009 and 2010?
Evidence:
table_1: in billions of dollars the december 31 2010 of aggregate cost is $ 3.1 ; the december 31 2010 of fair value is $ 2.5 ; the december 31 2010 of level 2 is $ 0.7 ; the december 31 2010 of level 3 is $ 1.8 ;
table_2: in billions of dollars the december 31 2009 of aggregate cost is $ 2.5 ; the december 31 2009 of fair value is $ 1.6 ; the december 31 2009 of level 2 is $ 0.3 ; the december 31 2009 of level 3 is $ 1.3 ;
Program: subtract(1.8, 1.3)
Answer:
str_answer: .5
exe_answer: 0.5