Problem-Solving and Data Analysis practice question

Answer: B. 60

40% = 0.40, and 0.40 × 150 = 60. A quick check: 10% of 150 is 15, so 40% is 4 × 15 = 60.

Why the other answers are wrong

A. 40

You picked up the number 40 from the percent itself; 40% is a rate, so you still need 0.40 × 150.

C. 90

That's 60% of 150, not 40% — you used the complement percentage.

D. 110

You subtracted 40 from 150 instead of taking 40% of it; 'of' means multiply by 0.40.

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