Question

A number is increased by 25% and then decreased by 30%. The net increase or decrease in % is:
1. Increment  8.5%
2. Decrement 8.5%
3. Decrement 12.5%
4. Increment 12.5%

Answer 1

Correct Answer - Option 3 : Decrement 12.5%

Given:

Increment in the number = 25%

Decrement in the number = 30%

Formula Used:

Net increase/decrease  = Increase% – Decrease% - (Increase %× Decrease%)/100

Calculation:

Net increase/decrease  = Increase% – Decrease% - (Increase %× Decrease%)/100

⇒ 25 – 30 – (30 × 25)/100

⇒ - 5 – 7.5%

⇒ - 12.5%

∴ Net decrement is 12.5%.

The correct option is 3 i.e. Decrement 12.5%