A number is increased by 10% and the result is then increased by 20%. What is the net percentage increase?
A. 32%
B. 31%
C. 33%
D. 30%
A. 32%
B. 31%
C. 33%
D. 30%
Best answer
Answer: A. 32%
Answer: (A) 32%
Shortcut (successive change): \(a + b + \frac{ab}{100} = 10 + 20 + \frac{200}{100} = 32\%\).
Plain: 100 → 110 → 132, a net rise of 32%.
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