A number is increased by 20% and then decreased by 20%. Find the net increase or decrease percent?
- Does not changes
- Decreased by 4%
- Increased by 4%
- None of these
Explanation
Given:
Increment in number = 20% of the number
Decrement in number = 20% of the new number
Concept used:
Net increase or decrease percent = {(Original number or Final number) - (Final number or original number) ÷ Original number} × 100
Calculation:
Let the original number be 100
When the number is increased by 20%
New Number = 100 + 20% of 100
⇒ 100 + 20
⇒ 120
Now, the number is decreased by 20%
Final number = New number – 20% of new number
⇒ 120 – 20% of 120
⇒ 120 – 24
⇒ 96
∴ Net Decrease in percentage = { (100 – 96) / 100} × 100
⇒ {4/100} × 100
⇒ 4%
∴ The net decrease percentage is 4%.
Last verified on 11-07-2026
Related MCQs
- P = 1400(1.06)ᵗ
- P = 1400(0.94)ᵗ
- P = 1400 − 6t
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 20%
- 25%
- 30%
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 120
- 140
- 150
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 24,200
- 22,000
- 23,000
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
