Question

By selling 200 books , a man gain the selling price of 400 books . Find his gain percent​

Answer 1

Answer:

Selling books 200

Selling books 200SP of one book = x

Selling books 200SP of one book = xSP of 200books = 200x

Selling books 200SP of one book = xSP of 200books = 200xprofit = 400x

Selling books 200SP of one book = xSP of 200books = 200xprofit = 400xCP = 400-200 = 200x

Selling books 200SP of one book = xSP of 200books = 200xprofit = 400xCP = 400-200 = 200xHis gain in percent = 400x/200x  x 100

Selling books 200SP of one book = xSP of 200books = 200xprofit = 400xCP = 400-200 = 200xHis gain in percent = 400x/200x  x 100= 200%

Hope this will help you

Answer 2

Answer:

200%

Step-by-step explanation:

let

SP of 1 book is x

SP of 200 book are 200x

Profit is 400x

Profit=SP-CP

CP=Profit-SP

    =400x-200x

   =200x

Gain %=Profit/CP*100

          =400x/200x*100

          =200%