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If a country's population declines from 36 million to 34.92 million, what is the percentage decrease?

Answer and explanation

Correct answer: 3 percent

Percentage decrease is calculated by comparing the amount lost with the original population. The population falls from 36 million to 34.92 million, so first find the absolute decrease: 36 − 34.92 = 1.08 million. This value must be divided by the original 36 million, not by the final population, before converting it to a percentage.

Percentage decrease = (1.08 ÷ 36) × 100 = 3 percent. In full numbers, the decrease is 1,080,000 and \(1,080,000 ÷ 36,000,000\) × 100 also equals 3 percent. Therefore, option B is correct. The number 1.08 million describes the amount lost, while 3 percent describes that loss relative to the starting population. The value 10.8 percent confuses the number 1.08 million with a percentage.

Related tags

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

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