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If a country's dependency ratio falls from 70 to 50, by how much has the number of dependents per 100 working-age people changed?

Answer and explanation

Correct answer: A decrease of 20

The governing concept is the dependency ratio, which expresses the number of dependents for every 100 people in the working-age population. To find the change, subtract the new value from the old value: 70 − 50 = 20. Thus, the number of dependents has decreased by 20 per 100 working-age people, so option A is correct. Option B reverses the direction of change. Options C and D use one of the original values incorrectly rather than calculating the difference. A lower ratio may reduce the potential support burden, although its economic effect also depends on employment, productivity and social services.

Related tags

Dependency RatioRatio ChangeWorking-Age PopulationAge StructurePopulation CompositionGeographyClass 12 Mcq

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