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If a country's population changes from 24 million to 23.52 million in one year, what is the percentage change?

Answer and explanation

Correct answer: 2 percent decrease

Answer: B. First find the absolute change: 24 − 23.52 = 0.48 million, so the population has declined. Percentage change is calculated relative to the initial population: 0.48 ÷ 24 × 100 = 2%. Therefore, the population decreased by 2%. A is too small. C is wrong because the final population is lower than the initial population, so the change cannot be an increase. D confuses the numerical difference, 0.48 million, with a percentage; 4.8 is not the correct percentage relative to 24 million. The sign should be negative if written algebraically: −2%. Memory cue: percentage change uses the starting value as the base and the direction comes from whether the final value is higher or lower.

Related tags

Percentage DecreasePopulation ChangeNegative GrowthDemographic CalculationPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And GrowthGeography

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