A number is increased by 50% and then again by 50%. By what percentage should the increased number be reduced so as to get back the original number?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 55% .
Let original number = 100
After first 50% increase: 100 + 50 = 150
After second 50% increase: 150 + 75 = 225
Now, to return from 225 to 100:
Required % decrease = [(225 – 100) / 225] × 100
= (125 / 225) × 100 ≈ 55%