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A's salary is 20% more than B's. By what per cent is B's salary less than A's?
A16⅔%
B18%
C20%
D25%
Answer & Solution
Correct answer: A. 16⅔%
Let B = 100, so A = 120. B is less than A by (120 − 100)/120 × 100 = 100/6 = 16.67% (16⅔%). Percentages from a higher and a lower base are not symmetric — a common trap.
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