Discussion of Question with ID = 040 under Percentages

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Question

The age of Mr. X is 100% more than Mr. Y's age which is 20 years at present. By what percent is Y's age less than Mr. X's age?

A

50 %.

B

51 %.

C

49 %.

D

$17{2/3}$ %.

Soln.
Ans: a

Age of Mr. X is 20 + ${100 × 20}/100$ = 40 years. Mr. Y's age is less than Mr. X's age by ${100 × 20}/100$ = 20 years. In terms of percentage, it is $20/40$ × 100 = 50.

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