Question

A book seller buys books at a commission of 20% on the marked price.if he sells the books at the marked price ,then his gain percentage is ?​

Answer 1

Answer:

25 %

Step-by-step explanation:

Example

1. Say Marked price= 100

2. Cost price (CP) = 100-20--> 80

3.  Selling price(SP) = 100

4. Gain = SP-CP = 100-80 --> 20

GAIN PERCENTAGE

= (GAIN/ CP) *100

=(20/80)*100= 25%

So answer is 25%

Answer 2

Answer:

Gain percentage = 25%                

Given problem:

A book seller buys books at a commission of 20% on the marked price.if he sells the books at the marked price ,then his gain percentage is ?​

Step-by-step explanation:

Let 100 be the marked price of the book

from given data seller buys books at a commission of 20%

⇒    commission on books  = $(\frac{ 20}{ 100}) (100)$  = 20

⇒    cost price of the books = 100 - 20 = 80  

selling price of the books = marked price = 100  

therefore profit on book = S.P - C.P  =  100- 80 = 20

gain percentage  =  ( profit / C.P) × 100  

                              =  (20/80) × 100

                              =  (1/4) 100 = 25%