what is the roi of an investment in the s&p500 from 2010 to 2011?
stock performance graph : the graph below shows the cumulative total shareholder return assuming the investment of $ 100 , on december 31 , 2010 , and the reinvestment of dividends thereafter , if any , in the company's common stock versus the standard and poor's s&p 500 retail index ( "s&p 500 retail index" ) and the standard and poor's s&p 500 index ( "s&p 500" ) . .

|  | December 31, |
| :--- | :--- |
| Company/Index | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 |
| O'Reilly Automotive, Inc. | $100 | $132 | $148 | $213 | $319 | $419 |
| S&P 500 Retail Index | 100 | 103 | 128 | 185 | 203 | 252 |
| S&P 500 | $100 | $100 | $113 | $147 | $164 | $163 |

.

investment = 100
index_return = 100
roi = investment - index_return
answer = roi