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If a country's working-age population is 60 percent and elderly dependency ratio is 25, what percentage of the total population is elderly?

Answer and explanation

Correct answer: 15 percent

The elderly dependency ratio is calculated by comparing the elderly share with the working-age share. It is not the elderly percentage of the whole population, so the ratio cannot simply be read as 25 percent. Let the elderly share be \(E\). The statement means that 25 elderly people are present for every 100 working-age people.

Using the ratio, \(\frac{E}{60}\times100=25\). Rearranging gives \(E=60\times\frac{25}{100}=15\) percent. Therefore, option B is correct. A quick check confirms it: \(\frac{15}{60}\times100=25\). Option D would confuse the dependency ratio with the elderly share and would not use the given 60 percent working-age base correctly.

Related tags

Elderly ShareElderly Dependency RatioWorking Age PopulationRatio ConversionAge StructurePopulation CompositionGeographyClass 12 Mcq

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