Question

if cost price of 25 books is equal to selling price of 20 books,calculate the gain or lose per cent​

Answer 1

answer-

let cp of 1 book be 1

so, cp of 25 book is 25

now as cp of 25 book is equal to sp of 20 book,

so, sp of 20 book is 25

sp of 1 book is 25/20

sp of 1 book = 1.25

now cp of 1 book is 1

sp of 1 book is 1.25

sp is larger so he had a profit

profit= 1.25-1

profit=0.25 or 25 paise

profit% = profit*100/cp

profit% = 0.25*100/1

profit% = 25/1

profit% = 25%

hope it helps

have a nice day