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If the birth rate falls from 30 to 22 per thousand and the death rate falls from 10 to 8 per thousand, how does the natural increase rate change?

Answer and explanation

Correct answer: From 20 to 14 per thousand

Natural increase rate is calculated by subtracting the death rate from the birth rate. Initially, it is \(30-10=20\) per thousand. After the changes, it is \(22-8=14\) per thousand. Therefore the natural increase rate falls from 20 to 14 per thousand, making option A correct.

Although both birth and death rates decrease, they do not decrease by the same amount: births fall by 8 per thousand, while deaths fall by only 2 per thousand. The difference between births and deaths consequently becomes smaller by 6 per thousand. The answer is not based on adding the rates; natural increase always uses birth rate minus death rate. Migration is not involved in this calculation.

Related tags

Birth Death GapNatural Increase ChangeDemographic RatesPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And GrowthGeography

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