{"pre_text": ["part ii , item 7 until maturity , effectively making this a us dollar denominated debt on which schlumberger will pay interest in us dollars at a rate of 4.74% ( 4.74 % ) .", "the proceeds from these notes were used to repay commercial paper borrowings .", "0160 on april 20 , 2006 , the schlumberger board of directors approved a share repurchase program of up to 40 million shares of common stock to be acquired in the open market before april 2010 , subject to market conditions .", "this program was completed during the second quarter of 2008 .", "on april 17 , 2008 , the schlumberger board of directors approved an $ 8 billion share repurchase program for shares of schlumberger common stock , to be acquired in the open market before december 31 , 2011 , of which $ 1.43 billion had been repurchased as of december 31 , 2009 .", "the following table summarizes the activity under these share repurchase programs during 2009 , 2008 and ( stated in thousands except per share amounts and prices ) total cost of shares purchased total number of shares purchased average price paid per share ."], "post_text": ["0160 cash flow provided by operations was $ 5.3 billion in 2009 , $ 6.9 billion in 2008 and $ 6.3 billion in 2007 .", "the decline in cash flow from operations in 2009 as compared to 2008 was primarily driven by the decrease in net income experienced in 2009 and the significant pension plan contributions made during 2009 , offset by an improvement in working capital requirements .", "the improvement in 2008 as compared to 2007 was driven by the net income increase experienced in 2008 offset by required investments in working capital .", "the reduction in cash flows experienced by some of schlumberger 2019s customers as a result of global economic conditions could have significant adverse effects on their financial condition .", "this could result in , among other things , delay in , or nonpayment of , amounts that are owed to schlumberger , which could have a material adverse effect on schlumberger 2019s results of operations and cash flows .", "at times in recent quarters , schlumberger has experienced delays in payments from certain of its customers .", "schlumberger operates in approximately 80 countries .", "at december 31 , 2009 , only three of those countries individually accounted for greater than 5% ( 5 % ) of schlumberger 2019s accounts receivable balance of which only one represented greater than 0160 during 2008 and 2007 , schlumberger announced that its board of directors had approved increases in the quarterly dividend of 20% ( 20 % ) and 40% ( 40 % ) , respectively .", "total dividends paid during 2009 , 2008 and 2007 were $ 1.0 billion , $ 964 million and $ 771 million , respectively .", "0160 capital expenditures were $ 2.4 billion in 2009 , $ 3.7 billion in 2008 and $ 2.9 billion in 2007 .", "capital expenditures in 2008 and 2007 reflected the record activity levels experienced in those years .", "the decrease in capital expenditures in 2009 as compared to 2008 is primarily due to the significant activity decline during 2009 .", "oilfield services capital expenditures are expected to approach $ 2.4 billion for the full year 2010 as compared to $ 1.9 billion in 2009 and $ 3.0 billion in 2008 .", "westerngeco capital expenditures are expected to approach $ 0.3 billion for the full year 2010 as compared to $ 0.5 billion in 2009 and $ 0.7 billion in 2008. ."], "table": [["", "total cost of shares purchased", "total number of shares purchased", "average price paid per share"], ["2009", "$ 500097", "7825.0", "$ 63.91"], ["2008", "$ 1818841", "21064.7", "$ 86.35"], ["2007", "$ 1355000", "16336.1", "$ 82.95"]], "table_ori": [["", "Total cost of shares purchased", "Total number of shares purchased", "Average price paid per share"], ["2009", "$500,097", "7,825.0", "$63.91"], ["2008", "$1,818,841", "21,064.7", "$86.35"], ["2007", "$1,355,000", "16,336.1", "$82.95"]]}

Question: by how much did the average price per share decrease from 2007 to 2009?
Evidence:
table_1: the 2009 of total cost of shares purchased is $ 500097 ; the 2009 of total number of shares purchased is 7825.0 ; the 2009 of average price paid per share is $ 63.91 ;
table_3: the 2007 of total cost of shares purchased is $ 1355000 ; the 2007 of total number of shares purchased is 16336.1 ; the 2007 of average price paid per share is $ 82.95 ;
Program: subtract(63.91, 82.95), divide(#0, 82.95)
Answer:
str_answer: -23%
exe_answer: -0.22954