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If a region has a population of 1 million and increases by 25000 in one year, what is the annual population growth rate?

Answer and explanation

Correct answer: 2.5 percent

The annual population growth rate compares the increase with the population at the beginning of the period. The formula is \(\text{Growth rate} = \frac{\text{Population increase}}{\text{Initial population}} \times 100\). Substituting the values gives \(25000 \div 1000000 \times 100 = 2.5\) percent.

Thus, the population increased by one-fortieth of its initial size during the year, which is 2.5 percent. Option B is correct. The value 25 percent would result from treating 25,000 as a much larger fraction than it really is. Options A and C do not follow from the stated increase and initial population.

Related tags

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

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