A class has 16 boys and 20 girls. What fraction of the class are girls? Give your answer in its simplest form.
Need a hint?
How many pupils are there in the class altogether?
Worked answer
- Pupils in the class = 16 + 20 = 36.
- Fraction who are girls = 2036.
- 20 ÷ 4 = 5 and 36 ÷ 4 = 9, so the answer is 59.
Answer: 5/9
The mistake this question tests
Habit
Simplest form in final fraction answers
20/36 is right but not finished: 20 and 36 can both be divided by 4.
How to fix it at home →Wrong answers children often give:
- 5/4 Stopped at one part in ratio
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See the answer →Practise PSLE fractions until the mistakes stop.
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