what is the percent change in the investment into alexion pharmaceuticals between 7/02 and 7/03?
the company 2019s stock performance the following graph compares cumulative total return of the company 2019s common stock with the cumulative total return of ( i ) the nasdaq stock market-united states , and ( ii ) the nasdaq biotechnology index . the graph assumes ( a ) $ 100 was invested on july 31 , 2001 in each of the company 2019s common stock , the stocks comprising the nasdaq stock market-united states and the stocks comprising the nasdaq biotechnology index , and ( b ) the reinvestment of dividends . comparison of 65 month cumulative total return* among alexion pharmaceuticals , inc. , the nasdaq composite index and the nasdaq biotechnology index alexion pharmaceuticals , inc . nasdaq composite nasdaq biotechnology .

|  | 7/02 | 7/03 | 7/04 | 7/05 | 12/05 | 12/06 | 12/07 |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| Alexion Pharmaceuticals, Inc. | 100.00 | 108.38 | 102.64 | 167.89 | 130.56 | 260.41 | 483.75 |
| NASDAQ Composite | 100.00 | 128.98 | 142.51 | 164.85 | 168.24 | 187.43 | 204.78 |
| NASDAQ Biotechnology | 100.00 | 149.29 | 146.51 | 176.75 | 186.10 | 183.89 | 187.04 |

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investment_7_03 = 108.38
investment_7_02 = 100
change = investment_7_03 - investment_7_02
percent_change = change / investment_7_02
answer = percent_change * 100