A school book fair sold 88 comics and 132 storybooks on Day 1. On Day 2, the ratio of the number of comics sold to the number of storybooks sold was 3 : 5.
- What is the ratio of the number of comics to the number of storybooks sold on Day 1? Give your answer in its simplest form.
- If 120 storybooks were sold on Day 2, how many comics were sold on Day 2?
Need a hint?
In part (b), first find how many storybooks stand for one unit of the ratio 3 : 5.
Worked answer
- (a) 88 : 132; divide both terms by the common factor 44, giving 2 : 3.
- (b) On Day 2, 5 units are 120 storybooks, so 1 unit is 120 ÷ 5 = 24.
- (b) Comics are 3 units, so 3 × 24 = 72 comics.
Answer: 72 comics
The mistake this question tests
Habit
Simplest form in final fraction answers
Pupils who divide 120 by 3 instead of by 5 get 40 comics, because they split the storybooks into the wrong number of equal parts.
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