Question

the selling price 8 books is equal to the cost price of 21 books . find gain or loss percent​

Answer 1

Answer:

The gain percent = 162.5%

Step-by-step explanation:

Given:

• The selling price 8 books is equal to the cost price of 21 books.

To find:

• The gain or loss percent.

Solution:

Let the S.P. of 1 book be Rs. 1

• S.P. of 8 books = Rs. 1 × 8
• S.P. of 8 books = Rs. 8

We know,

S.P. 8 books = C.P. of 21 books = Rs. 8

Therefore, C.P. of 21 books = Rs. 8

• S.P. of 21 books = Rs. 1 × 21
• S.P. of 21 books = Rs. 21

Now,

• Profit = S.P. - C.P.
• Profit = 21 - 8
• Profit = Rs. 13

After that,

• Gain% = Gain/C.P. × 100
• Gain% = 13/8 × 100
• Gain% = 1300/8
• Gain% = 162.5%

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Answer 2

Step-by-step explanation:

let the cp of 1 book =1

then cp of 21 books=21=spof 8 books

then cp of 8 books is 8

profit=21‐8

=13

profit%=13/21×100

answer =162.5%