A library has 96 fiction books and 120 non-fiction books. What is the ratio of the number of fiction books to the number of non-fiction books in its simplest form?
- 96 : 120
- 24 : 30
- 8 : 10
- 4 : 5
Need a hint?
Look for the largest number that divides both 96 and 120 exactly.
Worked answer
- Find a common factor of 96 and 120, such as 24.
- Divide both numbers by 24: 96 ÷ 24 = 4 and 120 ÷ 24 = 5.
- So the ratio in simplest form is 4 : 5.
Answer: 4 : 5
The mistake this question tests
Habit
Simplest form in final fraction answers
Stopping after dividing by a small common factor (such as 6 or 12) leaves a ratio that can still be simplified further.
How to fix it at home →More PSLE ratio questions
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See the answer →Practise PSLE ratio until the mistakes stop.
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