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If a country has a population of 10 million and it increases by 1 million, what is the percentage growth?

Answer and explanation

Correct answer: 10 percent

Percentage growth compares the amount of increase with the population at the beginning of the period. The formula is \(\text{Growth percentage}=\frac{\text{Increase}}{\text{Initial population}}\times100\). It is important to use the initial population as the denominator, because growth is measured relative to the starting size.

The initial population is 10 million and the increase is 1 million. Therefore, \(\frac{1\text{ million}}{10\text{ million}}\times100=\frac{1}{10}\times100=10\) percent. Hence option C is correct. The fact that both quantities are expressed in millions means the units cancel; no conversion into individual persons is needed.

Related tags

Percentage Growth CalculationPopulation ArithmeticGrowth RatePopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And GrowthGeography

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