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If a country has a birth rate of 20 and a death rate of 8 per thousand, what is the simple natural increase rate difference?

Answer and explanation

Correct answer: 12 per thousand

Natural increase is the difference between the birth rate and the death rate when both are expressed using the same unit. The birth rate is 20 per thousand and the death rate is 8 per thousand. Subtracting deaths from births gives \(20-8=12\) per thousand. This means that, before considering migration, the population increases by 12 persons per thousand people in the stated period.

Option A is correct. Adding the two rates would give 28, but addition does not represent natural increase because deaths reduce population rather than add to it. The answer is not 8 or 20 either, since both are only one of the two rates. This is the simple natural-increase calculation; a percentage form could be written as 1.2 percent, but the question asks for the difference per thousand.

Related tags

Birth RateDeath RateNatural Increase RatePopulation CalculationPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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