Problem-Solving and Data AnalysisVery hardChained percentage comparisons
Problem-Solving and Data Analysis practice question
Population A is 20% larger than population B, and population B is 25% smaller than population C. Population A is what percent of population C?
Answer: 90
A = 1.2B and B = 0.75C, so A = 0.9C, which is 90% of C.
Common wrong answers
- If you answered 80
- 80 uses A = 0.8C.
- If you answered 95
- 95 subtracts 5 from 100, adding the percent changes.
- If you answered 105
- 105 adds the two percentages as if they went the same way.
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