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#### Comparing Quantities Class 7 Maths | Revised NCERT Solutions | Chapter 7 Exercise 7.2 Questions 1-11

Overview

Class 7 Maths NCERT Chapter 7 Comparing Quantities.

In this video, we will cover:

1.  Tell what is the profit or loss in the following transactions. Also find profit per cent or loss per cent in each case.
(a) Gardening shears bought for ` 250 and sold for ` 325.
(b) A refrigerater bought for ` 12,000 and sold at ` 13,500.
(c) A cupboard bought for ` 2,500 and sold at ` 3,000.
(d) A skirt bought for ` 250 and sold at ` 150.

2. Convert each part of the ratio to percentage:
(a) 3 : 1 (b) 2 : 3 : 5 (c) 1:4 (d) 1 : 2 : 5

3. The population of a city decreased from 25,000 to 24,500. Find the percentage decrease.

4. Arun bought a car for ` 3,50,000. The next year, the price went upto ` 3,70,000. What was the Percentage of price increase?

5. I buy a T.V. for ` 10,000 and sell it at a profit of 20%. How much money do I get for it?

6. Juhi sells a washing machine for ` 13,500. She loses 20% in the bargain. What was the price at which she bought it?

7. (i) Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk.
(ii) If in a stick of chalk, carbon is 3g, what is the weight of the chalk stick?

8. Amina buys a book for ` 275 and sells it at a loss of 15%. How much does she sell it for?

9. Find the amount to be paid at the end of 3 years in each case:
(a) Principal = ` 1,200 at 12% p.a. (b) Principal = ` 7,500 at 5% p.a.

10. What rate gives ` 280 as interest on a sum of ` 56,000 in 2 years?

11. If Meena gives an interest of ` 45 for one year at 9% rate p.a.. What is the sum she
has borrowed?

12. Ex. 7.2 Comparing Quantities NCERT Solutions

13. Comparing Quantities Class 7 Maths NCERT Solutions

14. Chapter 7 Class 7 Maths NCERT Solutions

15. Comparing Quantities Chapter 7 Class 7 Maths

16. LearnoHub NCERT Solutions

17. Maths for Class 7 Chapter 7

18. Chapter 7 Maths Class 7

19. Learnohub Class 7 Maths

20. NCERT Solutions Learnohub

21. NCERT Solutions Maths Class 7

22. Maths Class 7 LH

23. Comparing Quantities Maths Class 7

24. Comparing Quantities NCERT Solutions Class 7 Maths

25. NCERT Solutions Class 7

26. Comparing Quantities Class 7 Maths

27. Comparing Quantities Class 7 Maths Chapter 7

28. Maths Class 7 Ex. 7.2

29. Class 7 Maths NCERT Solutions

30. NCERT Solutions Class 7 Maths Ex. 7.2

31. Comparing Quantities Ex. 7.2 Questions

32. Ex. 7.2 Class 7 Maths

33. Ex. 7.2 New NCERT Solutions

34. Comparing QuantitiesClass 7 NCERT Solutions

Chapter 7 Comparing Quantities Class 7 Maths deals with:

In our daily life, we generally compare two things like comparing height of two persons, speed of two trains, etc. We come across terms like percentage, ratio, etc when dealing with comparing quantities.

For example let height of Heena is 150 cm and height of Amir is 75 cm.

We find that Heena is two times taller than Amir Or Amir’s height is 1/2 of Heena’s height.

We write the ratio of the heights as:

Heena’s height : Amir’s height is 150 : 75 or 2 : 1.

We see that the ratio for two different comparisons may be the same.

For comparing two quantities, the units must be the same.

In this chapter, we will study everything about comparing quantities.

Equivalent Ratios

We can compare different ratios and find whether they are equivalent or not. For this we have to first

convert them into fractions and then compare. If these fractions are equal, we say that the given ratios are equivalent.

Percentage-Another way of comparing Quantities

Percentages are numerators of fractions with denominator 100 and have been used in comparing

results. Per cent is represented by the symbol % and means hundredths too. That is 1% means 1 out of hundred or one hundredth. It can be written as: 1% = 1/100 = 0.01

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### All About: Comparing Quantities Class 7 Maths NCERT Chapter 8

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##### NCERT Ex. 7.2 Q.11

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More videos on this chapter

Comparing Quantities Class 7 Maths | Revised NCERT Solutions | Chapter 7 Exercise 7.1 Questions 1-10

Comparing Quantities Class 7 Maths | Revised NCERT Solutions | Chapter 7 Exercise 7.2 Questions 1-11

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