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If population increases from 2000 to 2200, what will be the percentage growth?

Answer and explanation

Correct answer: 10 percent

Correct answer: B, 10 percent. Percentage growth tells us how large the increase is compared with the original population. First find the absolute increase: 2200 − 2000 = 200. Next use the original population, 2000, as the base: percentage growth = (increase ÷ original population) × 100 = (200 ÷ 2000) × 100 = 10%. Therefore, the population grew by 10 percent. Option A is too small because 200 is one-tenth of 2000, not one-twentieth. Option C is not obtained from the formula. Option D would incorrectly treat the increase as one-fifth of the original population. Memory cue: percentage change always uses the old value as the denominator.

Related tags

Population GrowthPercentage IncreasePercentage CalculationBase PopulationPopulationGeographyClass 9 Mcq

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