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A country's population is 10 million and increases by 2 million over ten years. What is the total percentage growth?

Answer and explanation

Correct answer: 20 percent

Total percentage growth is measured against the initial population. The population begins at 10 million and increases by 2 million over the ten-year period. The question asks for the total growth during that period, not the average annual growth rate. Therefore, divide the total addition by the starting population.

The calculation is \(\frac{2000000}{10000000}\times100=20\) percent. Equivalently, 2 million is one-fifth of 10 million, and one-fifth equals 20 percent. Hence option C is correct. If the question asked for an annual compound rate, a separate calculation would be needed; that is not what is requested here.

Related tags

Ten Year GrowthTotal Percentage GrowthPopulation CalculationAbsolute IncreasePopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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