Problem-Solving and Data AnalysisEasyIncreasing a number by a percent
Problem-Solving and Data Analysis practice question
A plant was 60 centimetres tall and then grew by 50%. How tall is it now, in centimetres?
Answer: 90
50% of 60 is 30, so the new height is 60 + 30 = 90.
Common wrong answers
- If you answered 30
- 30 is the growth alone.
- If you answered 110
- 110 adds 50 centimetres instead of 50 percent.
- If you answered 120
- 120 doubles the height, which would be a 100% increase.
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