Explanation

To convert a percentage into a decimal, divide by 100.

40% = 40/100 = 0.40.

Last verified on 29-09-2026

Explanation

18 + 27 = 45

Last verified on 29-09-2026

Explanation

20% of 150 = (20/100) × 150 = 0.2 × 150 = 30

Last verified on 29-09-2026

Explanation

If 13% of a number is 52, then:

Number = 52 ÷ 13 × 100 = 400

Explanation

Loss = 9,000 − 8,000 = 1,000

Loss % = (Loss ÷ Cost Price) × 100

= (1,000 ÷ 9,000) × 100

= 11.11%

Explanation

Given:

a : b : c = 3 : 4 : 7

We need to find (a + b + c) : c

Step 1: Add the ratios:

3 + 4 + 7 = 14

Step 2: The value of c = 7

Step 3: Form the ratio:

14: 7

Step 4: Simplify:

14 : 7 = 2 : 1

Explanation

Given:

• Price = Rs. 250
• Old sales tax = 8%
• New sales tax = 6%

Step 1: Difference in tax rate
8% − 6% = 2%

Step 2: Calculate 2% of Rs. 250

2/100x250 =5

$$frac{2}{100} times 250 = 5$$

Rs. 5

Explanation

Given:

Cost Price (CP) = Rs. 1,000

Selling Price (SP) = Rs. 900

Loss = CP − SP

= 1000 − 900 = Rs. 100

Loss % = (Loss ÷ CP) × 100

= (100 ÷ 1000) × 100

= 10%

Explanation

5 → 25, so multiplier = 25 ÷ 5 = 5

Second quantity = 8 × 5 = 40

Explanation

Cost of 1 pen = 250 ÷ 5 = Rs. 50

Cost of 8 pens = 50 × 8 = Rs. 400