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

Total Cost:

20 kg x 8.50 = 170

35 kg x 8.75 = 306.25

Total = 170 + 306.25 = 476.25 for 55 kg

Cost per kg = 476.25 / 55 = 8.66 Rs

To make 40% profit, selling price = cost x 1.4

Selling price = 8.66 x 1.4 = 12.12 to 12.13 Rs per kg

Last verified on 14-10-2026

Explanation

17% of 51

= (17/100) × 51

= 8.67

Explanation

Number=600×100/3​

=20,000

Explanation

Required fraction = 45 / 120

= 15 _ 3 / 15 _ 8

= 3/8

Last verified on 12-10-2026