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2 votes
Three eights of the cast in a musical have to sing. What fraction of the cast does not have to sing

User Semekh
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2 Answers

1 vote
5/8 of the cast does not have to sing. You find this by doing 8/8 - 5/8
User Kissy
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7.6k points
3 votes
3/8 has to sing
8/8 is all
all=haveto+don'thaveto
all=8/8
haveto=3/8
subsitute
8/8=3/8+don'thaveto
subtract 3/8 from both sides
8/8-3/8=5/8
5/8=don'thavetosing

answer is 5/8
User ContentiousMaximus
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7.1k points