Class 8 Maths – Chapter 8

Comparing Quantities

Important Exam Questions (VSA / SA / LA)

🔹 Very Short Answer Questions (1 Mark)

1. Write 25% as a fraction.

Answer: 25% = 25/100 = 1/4

2. Find the gain if CP = ₹500 and SP = ₹550.

Answer: Gain = 550 − 500 = ₹50

3. What is discount?

Answer: Discount is the reduction given on the marked price of an article.

4. Write the formula for Simple Interest.

Answer: SI = (P × R × T) / 100

5. If SP > CP, is it profit or loss?

Answer: Profit (Gain)

🔹 Short Answer Questions (2–3 Marks)

6. Convert 0.75 into percentage.

Answer:
0.75 × 100 = 75%

7. Find the discount when MP = ₹1200 and SP = ₹1080.

Answer:
Discount = 1200 − 1080 = ₹120

8. A shirt is bought for ₹600 and sold for ₹660. Find the gain percentage.

Answer:
Gain = 660 − 600 = ₹60
Gain % = (60 ÷ 600) × 100 = 10%

9. Find the Simple Interest on ₹2000 at 5% per annum for 3 years.

Answer:
SI = (2000 × 5 × 3) / 100 = ₹300

🔹 Long Answer Questions (4–5 Marks)

10. Find the selling price of a bicycle whose marked price is ₹4000 if a discount of 15% is given.

Answer:
Marked Price (MP) = ₹4000
Discount = 15% of 4000 = (15 ÷ 100) × 4000 = ₹600
Selling Price (SP) = 4000 − 600 = ₹3400

11. Find the Simple Interest and Amount when ₹3000 is invested at 8% per annum for 2 years.

Answer:
P = ₹3000, R = 8%, T = 2 years
SI = (3000 × 8 × 2) / 100 = ₹480
Amount = P + SI = 3000 + 480 = ₹3480

12. A shopkeeper buys an article for ₹2500 and sells it for ₹2875. Find the gain percentage.

Answer:
Gain = 2875 − 2500 = ₹375
Gain % = (375 ÷ 2500) × 100 = 15%

📝 Examiner Tip: Always write formula first and show step-by-step working to score full marks.