what was the difference in total return for the five year period ended 12/31/16 between a . o . smith corporation and the s&p mid cap 400 index?
the graph below shows a five-year comparison of the cumulative shareholder return on our common stock with the cumulative total return of the standard & poor 2019s ( s&p ) mid cap 400 index and the russell 1000 index , both of which are published indices . comparison of five-year cumulative total return from december 31 , 2011 to december 31 , 2016 assumes $ 100 invested with reinvestment of dividends period indexed returns .

|  | BasePeriod | Indexed Returns |
| :--- | :--- | :--- |
| Company/Index | 12/31/11 | 12/31/12 | 12/31/13 | 12/31/14 | 12/31/15 | 12/31/16 |
| A. O. Smith Corporation | 100.0 | 159.5 | 275.8 | 292.0 | 401.0 | 501.4 |
| S&P Mid Cap 400 Index | 100.0 | 117.9 | 157.4 | 172.8 | 169.0 | 204.1 |
| Russell 1000 Index | 100.0 | 116.4 | 155.0 | 175.4 | 177.0 | 198.4 |

2011 2012 2013 2014 2015 2016 smith ( a o ) corp s&p midcap 400 index russell 1000 index .

total_return_smith = 501.4
total_return_snp = 204.1
difference_in_returns = total_return_smith - total_return_snp
answer = difference_in_returns / 100 * 100