human
stock performance graph: the graph below shows the cumulative total shareholder return assuming the investment of $100, on december 31, 2013, and the reinvestment of dividends thereafter, if any, in the company 2019s common stock versus the standard and poor 2019s s&p 500 retail index (201cs&p 500 retail index 201d) and the standard and poor 2019s s&p 500 index (201cs&p 500 201d). .
|  | December 31, |
| Company/Index | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 |
| O’Reilly Automotive, Inc. | $100 | $150 | $197 | $216 | $187 | $268 |
| S&P 500 Retail Index | 100 | 110 | 137 | 143 | 184 | 208 |
| S&P 500 | $100 | $111 | $111 | $121 | $145 | $136 |
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Please answer the following questions with expressions if necessary.
what was the value of s&p500 in 2017?
assistant
145
human
and what was it in 2013?
assistant
100
human
what was, then, the change over the years?
assistant
subtract(145, 100)
human
what was the value of s&p500 in 2013?
assistant
100
human
and how much does that change represent in relation to this 2013 value?
assistant
subtract(145, 100), divide(#0, 100)