SOLUTION: in a class 60 children, 30% are girl. how many boys are there how to solve this question.

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Question 1014368: in a class 60 children, 30% are girl. how many boys are there how to solve this question.
Answer by ikleyn(53751) About Me  (Show Source):
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in a class 60 children, 30% are girl. how many boys are there how to solve this question.
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Since 30% are girls, then 70% are boys. Is it clear?

Now, 70% of 60 is 70%2F100 of 60, or %2870%2F100%29%2A60 = %287%2F10%29%2A60 = %287%2A60%29%2F10 = 7*6 = 42.