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25-09-2016
Mathematics

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If there are 9 girls and 11 boys in a class, what percentage of the class are girls

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25-09-2016

1. Find the total number of class members
9 + 11 = 20

2. Find 9 as a percentage of 20
9 / 20 = 0.45
0.45 x 100 = 45%

45% of the class are girls.

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