A shopkeeper allows 20 percent discount on the marked price of an article and be suffers a loss of 5 percent. If the article is sold at marked price, then what will be the profit percentage?

18.75 percent

            CP                    MP

   (100 - D%)           (100 - L%)

   (100 - 20%)           (100 - 5%)

      (80)                      (95)

If he allows no discount on MP then Profit % =  \(\frac{(95 - 80) × 100}{80}\) = 18.75%