Question

cost price 36 book is 360 if the profit percent is 30% what is the selling price

Answer 1

Let,
SP of each books is rs.30
CP of 30 books is rs.30
SP of 36 books is rs.36
sp>cp=gain
gain=sp-cp
=36-30
=6
gain%=gain/cp×100
=6/30×100
=20%