have access to liquidity by issuing bonds to public or private investors based on our assessment of the current condition of the credit markets . at december 31 , 2009 , we had a working capital surplus of approximately $ 1.0 billion , which reflects our decision to maintain additional cash reserves to enhance liquidity in response to difficult economic conditions . at december 31 , 2008 , we had a working capital deficit of approximately $ 100 million . historically , we have had a working capital deficit , which is common in our industry and does not indicate a lack of liquidity . we maintain adequate resources and , when necessary , have access to capital to meet any daily and short-term cash requirements , and we have sufficient financial capacity to satisfy our current liabilities . cash flows millions of dollars 2009 2008 2007 .
operating activities lower net income in 2009 , a reduction of $ 184 million in the outstanding balance of our accounts receivable securitization program , higher pension contributions of $ 72 million , and changes to working capital combined to decrease cash provided by operating activities compared to 2008 . higher net income and changes in working capital combined to increase cash provided by operating activities in 2008 compared to 2007 . in addition , accelerated tax deductions enacted in 2008 on certain new operating assets resulted in lower income tax payments in 2008 versus 2007 . voluntary pension contributions in 2008 totaling $ 200 million and other pension contributions of $ 8 million partially offset the year-over-year increase versus 2007 . investing activities lower capital investments and higher proceeds from asset sales drove the decrease in cash used in investing activities in 2009 versus 2008 . increased capital investments and lower proceeds from asset sales drove the increase in cash used in investing activities in 2008 compared to 2007. .
<i>Millions of Dollars</i> <i>2009</i> 2008 2007
Cash provided by operating activities $3,234 $4,070 $3,277
Cash used in investing activities (2,175) (2,764) (2,426)
Cash used in financing activities (458) (935) (800)
Net change in cash and cash equivalents $601 $371 $51
millions of dollars 2009 2008 2007
cash provided by operating activities $ 3234 $ 4070 $ 3277
cash used in investing activities -2175 ( 2175 ) -2764 ( 2764 ) -2426 ( 2426 )
cash used in financing activities -458 ( 458 ) -935 ( 935 ) -800 ( 800 )
net change in cash and cash equivalents $ 601 $ 371 $ 51
what was the percentage change in cash provided by operating activities from 2007 to 2008?