Question

Joy bought pens at rs.120 a dozen.he sold them for rs.15 each.what is his profit percent?

Answer 1

orignal price of each pen=120÷12=10
selling price=rs15×10=rs150
profit=150-120=30
profir percent=30/120×100=25percent

Answer 2

cost of 12 pens(a dozen) = 120
selling price of 1 pen = 15
selling price of 12 pens = 12*15 = 180

profit = sp - cp = 180 - 120 = 60
profit % = profit / cp * 100
= 60/120*100
= 50%