NCERT Class 8 Mathematics Solutions: Chapter 8 – Comparing Quantities Exercise 8.2 Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question: 1 A man got 10 % increase in his salary. If his new salary is ₹ 1,54, 000 find his original salary.

Answer:

Let original salary be ₹ 100

Therefore, new salary i.e.. 10 % increase

Here, New salary = 1,54, 000

Original salary =

Hence original salary is ₹ 1,40, 000.

Question: 2 On Sunday 845 people went to the Zoo. On Monday only 169 people went. What is the percent decrease in the people visiting the Zoo on Monday?

Answer:

People went to Zoo on Sunday

People went to Zoo on Monday

Number of decrease in the people

Decrease

Hence decrease in the people visiting the Zoo is 80 % .

Question: 3 A Shopkeepers buys 80 articles for ₹ 2400 and sells them for a profit of 16 % . Find the selling price of one article.

Answer:

No. of article = 80

Cost of articles and profit

Profit

Selling price

SP of 1 article

Question: 4 The cost of an article was ₹ 15,500, ₹ 450 were spent on its repairs. If it sold for a profit of 15 % , find the selling price of the article.

Answer:

Here, C. P = ₹ 15,500 and repair cost = ₹ 450

So, total cost price

Profit

Selling price