page 15 of 100 shareholder return performance the line graph below compares the annual percentage change in ball corporation 2019s cumulative total shareholder return on its common stock with the cumulative total return of the dow jones containers & packaging index and the s&p composite 500 stock index for the five-year period ended december 31, 2010. it assumes $100 was invested on december 31, 2005, and that all dividends were reinvested. the dow jones containers & packaging index total return has been weighted by market capitalization. total return analysis.

- | 12/31/05 | 12/31/06 | 12/31/07 | 12/31/08 | 12/31/09 | 12/31/10
ball corporation | $100.00 | $110.86 | $115.36 | $107.58 | $134.96 | $178.93
dj containers & packaging index | $100.00 | $112.09 | $119.63 | $75.00 | $105.34 | $123.56
s&p 500 index | $100.00 | $115.80 | $122.16 | $76.96 | $97.33 | $111.99
copyright a9 2011 standard & poor 2019s a division of the mcgraw-hill companies inc. all rights reserved. (www.researchdatagroup.com/s&p.htm) | copyright a9 2011 standard & poor 2019s a division of the mcgraw-hill companies inc. all rights reserved. (www.researchdatagroup.com/s&p.htm) | copyright a9 2011 standard & poor 2019s a division of the mcgraw-hill companies inc. all rights reserved. (www.researchdatagroup.com/s&p.htm) | copyright a9 2011 standard & poor 2019s a division of the mcgraw-hill companies inc. all rights reserved. (www.researchdatagroup.com/s&p.htm) | copyright a9 2011 standard & poor 2019s a division of the mcgraw-hill companies inc. all rights reserved. (www.researchdatagroup.com/s&p.htm) | copyright a9 2011 standard & poor 2019s a division of the mcgraw-hill companies inc. all rights reserved. (www.researchdatagroup.com/s&p.htm) | copyright a9 2011 standard & poor 2019s a division of the mcgraw-hill companies inc. all rights reserved. (www.researchdatagroup.com/s&p.htm)
copyright a9 2011 dow jones & company. all rights reserved. | copyright a9 2011 dow jones & company. all rights reserved. | copyright a9 2011 dow jones & company. all rights reserved. | copyright a9 2011 dow jones & company. all rights reserved. | copyright a9 2011 dow jones & company. all rights reserved. | copyright a9 2011 dow jones & company. all rights reserved. | copyright a9 2011 dow jones & company. all rights reserved.

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what is the price of ball corporation in 2010? 178.93

what is that less an initial $100 investment? 78.93

what is that difference over 100?