Question

The selling price of a book is times its cost price, find the gain percent.

Please answer ASAP ​

Answer 1

Answer:

We know, selling price = cost price + profit

selling price = cost price + profit%/100 × cost price

selling price = 100 × cost price + profit% × cost price/100

selling price = (100 + profit%)cost price/100; [Here, cost price and profit% are known.]