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If population increases from 25 lakh to 30 lakh, what is the growth percentage?

Answer and explanation

Correct answer: 20 percent

Direct answer: C, 20%, is correct. Step 1: find the absolute increase: 30 lakh − 25 lakh = 5 lakh. Step 2: compare this increase with the base population, which is 25 lakh: 5 ÷ 25 = 0.2. Step 3: multiply by 100, giving 20%. The formula is percentage growth = (increase ÷ base population) × 100. A is wrong because it does not use the correct fraction. B is also below the calculated value. D incorrectly treats the increase as if it were equal to the whole base population fraction of one-fourth. The denominator must be the initial or base population, not the final population. Memory cue: subtract first, divide by the starting population, then multiply by 100.

Related tags

Growth PercentageBase PopulationPopulation CalculationPopulation GrowthPopulationGeographyClass 9 Mcq

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