SAT Percentages Practice Question 4 (Medium)

Math · Problem-Solving and Data AnalysisMedium

The population of a town was $18{,}400$ in $2020$ and $20{,}240$ in $2023$ . By what percent did the population increase from $2020$ to $2023$ ?

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Answer: 10

The increase is $20{,}240 - 18{,}400 = 1{,}840$ . Percent increase is the change divided by the original amount: $\frac{1840}{18400} = 0.10$ , which is $10\%$ .

Dividing the change by the new population, $\frac{1840}{20240} \approx 9.1\%$ , uses the wrong base.

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