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One region's population rises from 5 million to 5.5 million, while another rises from 20 million to 21 million. Which region has the higher percentage growth?

Answer and explanation

Correct answer: First region

Percentage growth compares the increase with the original population, not merely the number of people added. The formula is \(\text{percentage growth}=\frac{\text{increase}}{\text{original population}}\times100\). This allows fair comparison between regions of different sizes. A larger absolute increase does not necessarily mean a larger percentage increase.

The first region increases by 0.5 million from 5 million, so its growth is \(\frac{0.5}{5}\times100=10\%\). The second increases by 1 million from 20 million, so its growth is \(\frac{1}{20}\times100=5\%\). Therefore option A, the first region, has the higher percentage growth. Area is not needed for this comparison because the question asks about population growth percentages.

Related tags

Percentage GrowthAbsolute GrowthPopulation ComparisonRelative IncreasePopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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