Priya spent 40% of her pocket money on books and 14 of the remaining money on stationery. What percentage of her pocket money was left?
- 60%
- 55%
- 45%
- 35%
Need a hint?
The stationery money is 14 of what is left after buying books, not 14 of the whole amount.
Worked answer
- Start with 100% of the pocket money.
- Spent on books: 40% of 100% = 40%.
- Remaining after books: 100% - 40% = 60%.
- Spent on stationery: 14 of 60% = 15%.
- Left: 60% - 15% = 45%.
Answer: 45%
The mistake this question tests
Habit
Fraction of a remainder
Pupils often take 14 of the original 100% (25%) and subtract 40% + 25% from 100%, getting 35%.
How to fix it at home →Wrong answers children often give:
- 35% Fraction of a remainder
- 60% Calculation slip
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See the answer →Practise PSLE percentage until the mistakes stop.
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