1. The problem statement, all variables and given/known data At bernie's Bargain basement everything is sold for 20% less than the price marked. If bernie buys radios for $80, what price should he mark them if he wants to make a 20% profit on his cost? 2. Relevant equations To increase a number by K% multiply it by (1+k%) 3. The attempt at a solution For profit he has to increase the price by 20%. Two ways: 20/100 * (80) =16 and then 80 + 16 = 96 OR 80(1+20/100) = 80 * 1.2 = 96 Now this is the profit price but he is giving a discount of 20% also by retaining the 20 % profit. This means we have to increase the profit price by 20% 96(1.2) =115.2 but this is not correct. Somebody please guide me. Zulfi.