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If previous population is twenty lakh and current population is twenty eight lakh, what is the growth percentage?

Answer and explanation

Correct answer: Forty percent

The direct answer is C: forty percent. First find the absolute increase: current population minus previous population = 28 lakh − 20 lakh = 8 lakh. Growth percentage is calculated using the previous population as the base: (increase ÷ previous population) × 100. Therefore, (8 ÷ 20) × 100 = 0.4 × 100 = 40%. Option A, 20%, does not follow the calculation. Option B, 30%, is another incorrect percentage. Option D, 8%, confuses the absolute increase of 8 lakh with a percentage. The old value must be used as the denominator because growth is measured relative to the starting population. Memory cue: percentage growth = increase ÷ old value × 100.

Related tags

Growth PercentagePopulation CalculationAbsolute GrowthPopulation GrowthPopulationGeographyClass 9 Mcq

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