- 25.5%
- 26.5%
- 22%
- 27.33%
- 24.5%
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Official CET key: B · Cetking's answer: A — see why below
Approach: Successive percentage increase: a + b + ab/100.
Solution:
Assume the article's cost (original price) = 100.
After +10%: 110. After a further +15%: 110 × 1.15 = 126.5.
Profit = 126.5 − 100 = 26.5%.
Why the other options are wrong:
A (25.5%) and C (22%) miss or mis-add the 1.5% compounding term; D, E have no basis.
Cetking shortcut: 10 + 15 + (10 × 15)/100 = 26.5%.
Answer: B












