Question

A man sold a book at a profit of 25 percent of S.P. The percentage of profit on his cost price of
the book is?​

Answer 1

Answer: C.P. = Rs. 50.

Step-by-step explanation:

Let C.P.be 100.

Gain =25%

S.P. =100+25% of 100=125

Suppose C.P. =80

Gain =30%

S.P. =

100

130×80

​

=104

Difference =125−104=21

Now comparing difference

21 on 100

1 on  

21

100

​

So, 10.50 on =

21

10.50×100

​

=50

So, required C.P. = Rs. 50.