Adil Afiq's answer to TJJA's Primary 6 Maths Fractions Singapore question.
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3/5 - 4/15 = 140 people
1/3 = 140 people
Total number of people at the concert
= 140 * 3
= 420
Number of adults = 420*3/5 = 252
Number of boys = 4/15 * 420 = 112
Number of girls = 420-112-252 = 56
Since 1/8 are boys after some of them left
7/8 are adults and girls
7/8 = 252+56 = 308
Number of boys still at the concert
= 308/7 = 44
Therefore number of boys who left
= 112-44 = 68
1/3 = 140 people
Total number of people at the concert
= 140 * 3
= 420
Number of adults = 420*3/5 = 252
Number of boys = 4/15 * 420 = 112
Number of girls = 420-112-252 = 56
Since 1/8 are boys after some of them left
7/8 are adults and girls
7/8 = 252+56 = 308
Number of boys still at the concert
= 308/7 = 44
Therefore number of boys who left
= 112-44 = 68
Date Posted:
4 years ago
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