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A city's population was 800000 and declined by 5 percent. What is the new population?

Answer and explanation

Correct answer: 760000

A decline means that a percentage of the original population is removed. The original population is 800,000, and 5 percent is written as \(0.05\). First calculate the number of people lost, then subtract that number from the original population. This avoids confusing a decrease with an increase.

The decrease is \(800000\times0.05=40000\). The remaining population is \(800000-40000=760000\), which is 7.6 lakh. Equivalently, 95 percent remains, so \(800000\times0.95=760000\). The value 840,000 would be obtained by adding 5 percent and would represent growth, not decline. Therefore, option A is correct.

Related tags

Population DeclinePercentage DecreaseNew PopulationPopulation CalculationPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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