The number of persons rose by 20% to 30,942 in a year. What was the populatio originally a year ago?
Answer & explanation
Correct answer: option 2
Let the population a year ago be x.
So,
x + 20% of x = 30942
x + \(\frac{20x}{100}\) = 30942
x × \(\frac{x}{5}\) = 30942
\(\frac{6x}{5}\) = 30942
x = 25785