the cost price 12 pen is equal to selling price of 10 pens find the profit percentage
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let the cost price 1 pen be x
then the price of 12 pen = 12x
selling price of 10 pens = 12x
then the selling price of 1 pen = 12x#10=1.2x
profit=1.2 x- x=0.2x
profit percentage = 0.2x# x into 100 = 20%
then the price of 12 pen = 12x
selling price of 10 pens = 12x
then the selling price of 1 pen = 12x#10=1.2x
profit=1.2 x- x=0.2x
profit percentage = 0.2x# x into 100 = 20%
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