SOLUTION: A shopkeeper buys pens at the rate of 75 per 100. For how much should he sell each pen so as to make a gain of 15 %

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: A shopkeeper buys pens at the rate of 75 per 100. For how much should he sell each pen so as to make a gain of 15 %      Log On


   

Question 981234: A shopkeeper buys pens at the rate of 75 per 100. For how much should he sell each pen so as to make a gain of 15 %
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Hi there,
75 per 100 pens
Divide both sides by 100
0.075 per 1 pen
100% + 15% = 115% = 115/100 = 1.15
0.075 x 1.15
0.08625
This is what he must sell the pens
at to achieve 15% profit
Proof
0.08625- 0.075
=0.01125
0.01125/0.075 x 100 = 15% profit.
Hope this helps:-)