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If previous population is twenty five lakh and increase is five lakh, what will be the growth percentage?

Answer and explanation

Correct answer: Twenty percent

Answer: B, twenty percent. Percentage growth is calculated by dividing the increase by the previous population and multiplying by 100. Increase = 5 lakh and previous population = 25 lakh. Thus, growth percentage = (5 ÷ 25) × 100 = 0.2 × 100 = 20%. The unit lakh cancels because both quantities use the same unit. A, 10%, would correspond to an increase of 2.5 lakh on a base of 25 lakh. C, 25%, incorrectly treats the increase as if it were one-fourth of the base. D, 5%, confuses the numerical increase of five lakh with a percentage. Use the previous population as the denominator, not the current population, unless a different measure is explicitly requested. Memory cue: percentage growth = increase ÷ old population × 100.

Related tags

Growth PercentagePrevious PopulationPercentage FormulaCalculationPopulation GrowthPopulationGeographyClass 9 Mcq

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