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If a country's population declines from 75 million to 71.25 million, what is the percentage decrease?

Answer and explanation

Correct answer: 5 percent

To find a percentage decrease, first calculate how much the population fell and then compare that decrease with the original population. The original population was 75 million, and the later population was 71.25 million. Therefore, the decrease is \(75-71.25=3.75\) million. The original value, not the final value, is used as the base.

The percentage decrease is \((3.75/75)\times100=5\) percent. Equivalently, 71.25 million is 95 percent of 75 million, so the loss is 5 percent. Therefore option C is correct. Option B would result from using an incorrect base or calculation, while 3 percent and 7.5 percent do not match the actual change.

Related tags

Percentage DecreasePopulation DeclinePopulation CalculationDemographyPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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