A number is first decreased by 18% and the resulting number is then increased by 25%. What is the overall percentage change in the original number?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Increase by 2.5%.
A number is first decreased by 18% and the resulting number is then increased by 25%
Net effect = x + y + xy/100
here, x = -18, and y = 25
Now,
Net change = -18 + 25 - 450/100
⇒ 7 - 4.5 = 2.5
So,
The original number will be increaded by 2.5%