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If a country has a birth rate of 26 per thousand and a death rate of 8 per thousand, what is the natural increase rate in percent?

Answer and explanation

Correct answer: 1.8 percent

The correct answer is A: 1.8 percent. Natural increase means births minus deaths, so 26 − 8 = 18 per thousand. A per-thousand value must be divided by 10 to convert it into a percentage because 1,000 = 100 × 10; therefore, 18 per thousand = 1.8 percent. Option A is correct because it gives both the right subtraction and the right unit conversion. Option B, 18 percent, forgets to convert per thousand into percent. Option C, 0.18 percent, divides by 100 instead of 10 and is ten times too small. Option D, 2.6 percent, uses the birth rate alone rather than subtracting deaths. Memory cue: first subtract births and deaths, then change “per thousand” to percent by dividing by 10.

Related tags

Natural Increase RateBirth RateDeath RatePer-Thousand ConversionPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And GrowthGeography

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