Explanation

TD = (P × R × T)/100

160 = (1760 × 12 × T)/(100 × 12)

T = (160 × 100 × 12)/(1760 × 12)

= 100/11 years

= 100/11 × 12 months

= 109.09 months ≈ 10 months (approx)

Last verified on 17-01-2026

Explanation

Girls: 900, Boys: 1100, Total: 2000

Boys passed: 50% of 1100 = 550

Girls passed: 40% of 900 = 360

Total passed: 550 + 360 = 910

Total failed: 2000 - 910 = 1090

Failure percentage: (1090/2000) × 100 = 54.5%

Last verified on 16-01-2026

Explanation

Formula:  

Percentage = (Present Students / Total Students) × 100

Given:  

Present = 340  

Total = 500

Calculation:  

(340 ÷ 500) × 100 = 0.68 × 100 = 68%

Question updated 03-March-2026

Explanation

SI = Principal × Rate × Time

= 1000 × 0.05 × 2

= 100

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%

Explanation

Initial speed = 90 km/h

Final speed = 72 km/h

Decrease = 90 - 72 = 18 km/h

Percent decrease = (18/90) × 100% = 20%

Explanation

Convert the percentage to a decimal: 90% = 0.90

Multiply the decimal by the number: 0.90 × 90 = 81 

Explanation

Let's assume the interest rate is 12% p.a. (common in Pakistan):

Interest = Principal × Rate × Time

54,000 = P × 0.12 × 3

P = 54,000 / (0.12 × 3)

= 54,000 / 0.36

= 150,000

Explanation

85% = 85 ÷ 100 = 0.85

Explanation

20% of 80,000 = 0.20 × 80,000 = 16,000

80,000 + 16,000 = 96,000