Cost price of 12 articles is equal to selling price of 9 articles. While the discount on 10 articles is equal to the profit earn on 5 articles. Find the difference between Profit % and Discount %.

22.22%

ATQ,

              12C = 9S

                  C → 3

                  S → 4

           C     :     S

           3     :     4

D × 10 = P × 5

           ⇒ D → 1, P → 2

           C     :     S

           6     :     8      (multiply by 2)

           ↓            ↓

           ------------

                 +2

 P% = \(\frac{2}{6}\) × 100 = 33.33%

MRP → 8 + 1 = 9

D % = \(\frac{1}{9}\) × 100 = 11.11%

Diff. b/w P% and D% = 33.33% - 11.11% = 22.22%