Explanation

A number is decreased by 20%, so 80% of the original number remains.

80% = 240

100% = 240 × 100 ÷ 80

= 300

Last verified on 06-09-2026

Explanation

Year 1: 250 × 1.10 = Rs. 275  

Year 2: 275 × 1.10 = Rs. 302.50  

Or directly: 250 × (1.10)² = 250 × 1.21 = Rs. 302.50

Last verified on 05-09-2026

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

Explanation

Formula: SI = (P × R × T) / 100

SI = (10,000 × 8 × 2) / 100 = Rs. 1,600

Last verified on 05-09-2026

Explanation

Formula: (Part / Whole) x 100

Here Part = 1.25 and Whole = 80

1.25 / 80 = 0.015625

0.015625 x 100 = 1.5625

Last verified on 05-09-2026