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A country has a population of 75 million and an annual growth rate of 1.2 percent. Approximately how much will it grow in one year by simple calculation?

Answer and explanation

Correct answer: 900,000

The correct answer is C: 900,000 people. To find a one-year increase, convert 1.2 percent into a fraction, 1.2/100, and multiply it by the starting population: 75,000,000 × 1.2/100 = 900,000. Thus, the population would increase by about nine lakh people in one year under the simple calculation. A would result from using 0.8 percent, not 1.2 percent. B incorrectly treats 1 percent as the increase. D treats 1.2 as if it were 1.2 percent of one million or applies the rate incorrectly. The percentage must always be applied to the original population. Memory cue: percentage increase = base population × rate ÷ 100.

Related tags

Annual Growth RatePercentage CalculationPopulation IncreaseAbsolute GrowthPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And GrowthGeography

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