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If a country has a population of 2 million and it increases by 20000 in one year, what is the annual growth rate?

Answer and explanation

Correct answer: 1 percent

Annual growth rate compares the increase during one year with the population at the beginning of that year. The formula is \(Growth\ rate=\frac{Increase}{Initial\ population}\times100\). The initial population is 2 million, or 2,000,000, and the increase is 20,000. Thus \(\frac{20000}{2000000}\times100=1\%\).

Therefore option B is correct. Another simple observation is that 20,000 is one hundredth of 2,000,000, so it represents 1 percent. The rate is not 0.1 percent, because that would correspond to only 2,000 people; it is not 10 or 20 percent, which would mean much larger increases. The calculation assumes the stated one-year increase is measured against the initial population.

Related tags

Growth Rate CalculationPercentage GrowthPopulation ArithmeticAnnual GrowthPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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