After offering a discount of 20% on an article, a trader earned a profit of 20%.If the cost price is ₹300, then what will be the selling price of the article after offering a discount of 25%?

₹337.5

        CP                    MP

      100 - D%           100 + P%

     100 - 20%           100 + 20%

         80                      120

CP = 80x = 300

SP after 25% discount on MP = 74% of 120 = 90

So, 80x = 300

90x = 337.5