what is the total return in valero common stock from 2008-2013?
table of contents the following performance graph is not 201csoliciting material , 201d is not deemed filed with the sec , and is not to be incorporated by reference into any of valero 2019s filings under the securities act of 1933 or the securities exchange act of 1934 , as amended , respectively . this performance graph and the related textual information are based on historical data and are not indicative of future performance . the following line graph compares the cumulative total return 1 on an investment in our common stock against the cumulative total return of the s&p 500 composite index and an index of peer companies ( that we selected ) for the five-year period commencing december 31 , 2008 and ending december 31 , 2013 . our peer group comprises the following 11 companies : alon usa energy , inc. ; bp plc ; cvr energy , inc. ; delek us holdings , inc . ( dk ) ; hollyfrontier corporation ; marathon petroleum corporation ; pbf energy inc . ( pbf ) ; phillips 66 ; royal dutch shell plc ; tesoro corporation ; and western refining , inc . our peer group previously included hess corporation , but it has exited the refining business , and was replaced in our peer group by dk and pbf who are also engaged in refining operations . comparison of 5 year cumulative total return1 among valero energy corporation , the s&p 500 index , old peer group , and new peer group .

|  | 12/2008 | 12/2009 | 12/2010 | 12/2011 | 12/2012 | 12/2013 |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| Valero Common Stock | $100.00 | $79.77 | $111.31 | $102.57 | $170.45 | $281.24 |
| S&P 500 | 100.00 | 126.46 | 145.51 | 148.59 | 172.37 | 228.19 |
| Old Peer Group | 100.00 | 126.98 | 122.17 | 127.90 | 138.09 | 170.45 |
| New Peer Group | 100.00 | 127.95 | 120.42 | 129.69 | 136.92 | 166.57 |

____________ 1 assumes that an investment in valero common stock and each index was $ 100 on december 31 , 2008 . 201ccumulative total return 201d is based on share price appreciation plus reinvestment of dividends from december 31 , 2008 through december 31 , 2013. .

a = 281.24 - 100 
answer = a