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If the birth rate falls from 32 to 24 per thousand and the death rate falls from 12 to 9 per thousand, how does the natural increase rate change?

Answer and explanation

Correct answer: From 20 to 15 per thousand

Natural increase rate is calculated by subtracting the death rate from the birth rate. Both rates are given per thousand, so the subtraction can be done directly and the answer remains per thousand. It is important not to add the two rates, because births increase population while deaths reduce it.

Initially, the natural increase is \(32-12=20\) per thousand. After the changes, it is \(24-9=15\) per thousand. Therefore, the natural increase falls from 20 to 15 per thousand, a decrease of 5 per thousand. Option A is correct. Although both birth and death rates decline, the birth rate falls by more, so natural increase becomes smaller.

Related tags

Birth Death GapNatural Increase ChangePopulation Growth RateDemographic RatesPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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