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The ratio of boys to girls at a movie is 4 font size decreased by 4 : 7. If there are 21​ girls, how many boys are at the​ movie?
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The ratio of boys to girls at a movie is 4 font size decreased by 4 : 7. If there are 21​ girls, how many boys are at the​ movie?

User Vernita
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1 Answer

3 votes
Set up a proportion

(boys)/(girls) = (4)/(7) = (B)/(21)

Solve for B by multiplying by 21 on both sides

B = 21*(4)/(7) = 12
User Andrew Olney
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