Last year, delivery driver Amir delivered 2400 parcels in Riverdale. This year, he delivered 3000 parcels. What was the percentage increase in the number of parcels delivered?
Need a hint?
Find the increase first, then compare it with the number of parcels delivered last year.
Worked answer
- Increase = 3000 − 2400 = 600 parcels.
- Percentage increase = 600 ÷ 2400 × 100% = 25%.
Answer: 25%
The mistake this question tests
Habit
Percentage of a new total
A common mistake is to divide the increase by the number delivered this year. The percentage increase must use last year's number as the starting amount.
How to fix it at home →Wrong answers children often give:
- 20% Percentage of a new total
- 125% Calculation slip
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See the answer →Practise PSLE percentage until the mistakes stop.
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