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It is really simple ! For an example : If kim got 15 wrong out of 72 questions , its 72 - 15 = 57 , so what you do is subtract the amount wrong of the amount taken away by the total and you divide that by your total , so 57/72 = 0.7916 and you x by 100 so 0.7916 x 100 = 79.16 , so Kim got a 79 on her test !

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11y ago
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