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%
1. Increment 8.5%
2. Decrement 8.5%
3. Decrement 12.5%
4. Increment 12.5%
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%