{"pre_text": ["corporate/other corporate/other includes treasury results , unallocated corporate expenses , offsets to certain line-item reclassifications reported in the business segments ( inter-segment eliminations ) , the results of discontinued operations and unallocated taxes .", "in millions of dollars 2008 2007 2006 ."], "post_text": ["2008 vs .", "2007 revenues , net of interest expense declined primarily due to the gain in 2007 on the sale of certain corporate-owned assets and higher inter-segment eliminations partially offset by improved treasury hedging activities .", "operating expenses declined primarily due to lower restructuring charges in the current year as well as reductions in incentive compensation and benefits expense .", "discontinued operations represent the sale of citigroup 2019s german retail banking operations and citicapital .", "see note 3 to the consolidated financial statements on page 136 for a more detailed discussion .", "2007 vs .", "2006 revenues , net of interest expense improved primarily due to improved treasury results and a gain on the sale of certain corporate-owned assets , partially offset by higher inter-segment eliminations .", "operating expenses increased primarily due to restructuring charges , increased staffing , technology and other unallocated expenses , partially offset by higher inter-segment eliminations .", "income tax benefits increased due to a higher pretax loss in 2007 , offset by a prior-year tax reserve release of $ 69 million relating to the resolution of the 2006 tax audits .", "discontinued operations represent the operations in the sale of the asset management business and the sale of the life insurance and annuities business .", "for 2006 , income from discontinued operations included gains and tax benefits relating to the final settlement of the life insurance and annuities and asset management sale transactions and a gain from the sale of the asset management business in poland , as well as a tax reserve release of $ 76 million relating to the resolution of the 2006 tax audits. ."], "table": [["in millions of dollars", "2008", "2007", "2006"], ["net interest revenue", "$ -1288 ( 1288 )", "$ -461 ( 461 )", "$ -345 ( 345 )"], ["non-interest revenue", "438", "-291 ( 291 )", "-599 ( 599 )"], ["revenues net of interest expense", "$ -850 ( 850 )", "$ -752 ( 752 )", "$ -944 ( 944 )"], ["operating expenses", "526", "1830", "202"], ["provisions for loan losses and for benefits and claims", "1", "-2 ( 2 )", "4"], ["loss from continuing operations before taxes and minority interest", "$ -1377 ( 1377 )", "$ -2580 ( 2580 )", "$ -1150 ( 1150 )"], ["income tax benefits", "-421 ( 421 )", "-922 ( 922 )", "-498 ( 498 )"], ["minority interest net of taxes", "-2 ( 2 )", "3", "2"], ["loss from continuing operations", "$ -954 ( 954 )", "$ -1661 ( 1661 )", "$ -654 ( 654 )"], ["income from discontinued operations", "4410", "628", "1087"], ["net income ( loss )", "$ 3456", "$ -1033 ( 1033 )", "$ 433"]], "table_ori": [["<i>In millions of dollars</i>", "2008", "2007", "2006"], ["Net interest revenue", "$(1,288)", "$(461)", "$(345)"], ["Non-interest revenue", "438", "(291)", "(599)"], ["Revenues, net of interest expense", "$(850)", "$(752)", "$(944)"], ["Operating expenses", "526", "1,830", "202"], ["Provisions for loan losses and for benefits and claims", "1", "(2)", "4"], ["Loss from continuing operations before taxes and minority interest", "$(1,377)", "$(2,580)", "$(1,150)"], ["Income tax benefits", "(421)", "(922)", "(498)"], ["Minority interest, net of taxes", "(2)", "3", "2"], ["Loss from continuing operations", "$(954)", "$(1,661)", "$(654)"], ["Income from discontinued operations", "4,410", "628", "1,087"], ["Net income (loss)", "$3,456", "$(1,033)", "$433"]]}

Question: what was the percentage change in non-interest revenue from 2006 to 2007?
Evidence:
table_2: in millions of dollars the non-interest revenue of 2008 is 438 ; the non-interest revenue of 2007 is -291 ( 291 ) ; the non-interest revenue of 2006 is -599 ( 599 ) ;
Program: subtract(-291, -599), divide(#0, -599)
Answer:
str_answer: 51%
exe_answer: -0.51419