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If the previous population is forty lakh and the increase is eight lakh, what will be the growth percentage?

Answer and explanation

Correct answer: Twenty percent

Direct answer: Option B, twenty percent, is correct. Percentage growth compares the increase with the population at the beginning of the period. Here, the increase is 8 lakh and the previous population is 40 lakh. First divide: 8 ÷ 40 = 0.2. Then multiply by 100: 0.2 × 100 = 20%. Equivalently, growth percentage = (increase ÷ previous population) × 100. Option A, 10%, is only half the calculated value. Option B matches the formula. Option C, 40%, incorrectly uses the previous population as though it were the percentage increase. Option D, 8%, treats the numerical increase in lakh as a percentage without comparison. Memory cue: the earlier population is the denominator in growth percentage.

Related tags

Growth PercentagePopulation CalculationBase PopulationPopulation GrowthPopulationGeographyClass 9 Mcq

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