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If a country's child share falls from 40 percent to 25 percent and the elderly share rises from 8 percent to 15 percent, by how much does the working-age share change?

Answer and explanation

Correct answer: An increase of 8 percentage points

The three broad age groups together make 100 percent of the population. Initially, the working-age share is \(100-40-8=52\) percent. After the change, it is \(100-25-15=60\) percent. The difference is \(60-52=8\) percentage points. The fall in the child share is 15 points, while the rise in the elderly share is 7 points, so the remaining working-age share rises by a net 8 points.

Option B is correct. The answer is an increase of 8 percentage points, not 8 percent relative growth. Option A does not account correctly for both changed groups, and option C mistakes the child-share decrease for the working-age change. Option D reverses the direction. This calculation assumes the stated child and elderly shares cover the non-working-age groups and that all age shares total 100 percent.

Related tags

Percentage PointsWorking-Age ShareAge CalculationPopulation CompositionAge StructureGeographyClass 12 Mcq

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