Three-fifths of a number is 45. What is the number?

Correct answer: C. 75

If 3/5 is 45, then 1/5 is 45 ÷ 3 = 15, and the whole number is 5 × 15 = 75. Check: 3/5 × 75 = 45. This "find one part, then the whole" method works for any fraction of an unknown number.

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Answer and explanation

The correct answer is C. 75

If 3/5 is 45, then 1/5 is 45 ÷ 3 = 15, and the whole number is 5 × 15 = 75. Check: 3/5 × 75 = 45. This "find one part, then the whole" method works for any fraction of an unknown number.

Topic: Mixed Numerical Review MCQs · Subject: Numerical Ability