SOLUTION: In a school, 45% the students are boys and the rest are girls.If girls number is 77,what is the strength of the school ?

Question 1108447: In a school, 45% the students are boys and the rest are girls.If girls number is 77,what is the strength of the school ?
Answer by greenestamps(13209) (Show Source): You can put this solution on YOUR website!

You can solve this using a proportion.

The boys are 45%, so the girls are 55%. Since the number of girls is 77, if x is the number of boys then

So there are 63 boys; then the total number of students is 77+63 = 140.

Alternatively, you could just say since 55% of the total number of students (the girls) is 77, if x is the total number of students then

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