At a neighbourhood bakery, Mrs Koh's community card normally gives her 20% off the marked price. A weekend app voucher gives a discount that is 50% greater than her community-card discount. What discount does the weekend app voucher give?
Need a hint?
Find 50% of the usual 20% discount first.
Worked answer
- Extra discount = 50% of the usual 20% = 10%.
- New discount = 20% + 10% = 30%.
Answer: 30%
The mistake this question tests
Habit
Found the increase, not the new price
A common mistake is to add 50 percentage points to 20%, giving 70%. The 50% is a proportional increase in the discount.
How to fix it at home →More PSLE percentage questions
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