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If a country's population declines from 62.5 million to 60 million, what is the percentage decrease?

Answer and explanation

Correct answer: 4 percent

Percentage decrease is always measured against the original, or starting, population. First find how many people were lost by subtracting the final population from the initial population. Then divide that loss by the initial population and multiply by 100. Using the final population as the base would give a different and inappropriate percentage for this question.

The decline is \(62.5-60=2.5\) million people. The percentage decrease is \((2.5 \div 62.5) \times 100 = 4\) percent. Equivalently, using people, \((2500000 \div 62500000)\times100=4\) percent. Therefore, option C, 4 percent, is correct.

Related tags

Percentage DeclineNegative Population GrowthPopulation CalculationDemography MathsPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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