## Comparing Quantities Class 8 Extra Questions Maths Chapter 8

**Q1. Express the following in decimal form:**

(**a**) 12%

**Ans**: 0.12

(**b**) 25%

**Ans**: 0.25

**Q2. Evaluate the following:**

(**a**) 20% of 400

**Ans**: 80

(**b**) 12.5% of 625

**Ans**: 78.125

**Q3. If 20% of x is 25, then find x.**

**Ans**: 125

**Q4. Express the following as a fraction**

(**a**) 35%

**Ans**: 7/20

(**b**) 64%

**Ans**: 16/25

**Q5. Express the following into percent**

**(а) 3:5**

**Ans**: 60%

**(b) 2:5**

**Ans**: 40%

**Q6. There are 24% of boys in a school. If the number of girls is 456, find the total number of students in the school.**

**Ans**: 600

**Q7. The cost of 15 articles is equal to the selling price of 12 articles. Find the profit percent.**

**Ans**: 25%

**Q8. An article is marked at ₹ 940. If it is sold for ₹ 799, then find the discount percent.**

**Ans**: 15%

**Q9. A watch was bought for ₹ 2,700 including 8% VAT. Find its price before the VAT was added.**

**Ans**: Rs 2500

**Q10. Find the amount if ₹ 2,000 is invested for 2 years at 4% p.a. compounded annually.**

**Ans**: Rs. 2163.20

**Q11. A number is increased by 20% and then it is decreased by 20%. Find the net increase or decrease percent. **

**Ans**: 4%

**Q12. Two candidates Raman and Rajan contested an election. Raman gets 46% of the valid votes and is defeated by 1600 votes. Find the total number of valid votes cast in the election.**

**Ans**: 20000

**Q13. A man whose income is ₹ 57,600 a year spends ₹ 43,200 a year. What percentage of his income does he save?**

**Ans**: 25%

**Q14. Find the amount of ₹ 6,250 at 8% pa compounded annually for 2 years. Also, find the compound interest.**

**Ans**: 1040

**Q15. Vishakha offers a discount of 20% on all the items at her shop and still makes a profit of 12%. What is the cost price of an article marked at ₹ 280?**

**Ans**: 200

**Q16. Find the compound interest on ₹ 48,000 for one year at 8% per annum when compounded half-yearly. (NCERT Exemplar)**

Ans: 3916.80