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JAMB Mathematics 2023 Paper

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Question : 5

Total: 80

The population of a village decreased from 1,230 to 1,040 due to breakout of an epidemic. What is the percentage decrease in the population?

15.44%
15.43%
15.42%
15.45%

Solution:

Concept:

Percentage decrease is found by dividing the decrease by the original value, then multiplying by 100.

Explanation:

Original population

= 1{,}230

.

New population

= 1{,}040

.

Decrease in population

= 1{,}230 - 1{,}040 = 190

.

Percentage decrease

= \frac{190}{1{,}230} \times 100\%

.

= \frac{19000}{1230}\% = 15.447\%

.

Rounded to two decimal places, this is

15.45\%

.

Answer:

D.

15.45\%

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