Correct Answer - Option 3 : 62.50%

**Given:**

Discount = 20%

Profit = 30%

**Calculation:**

Let M.P be 100x

S.P = (80/100) × 100x = 80x

Now, Profit = 30%

S.P = 130 and C.P = 100

So, S.P is same

130 = 80x

⇒ x = (80/130)

C.P = (80/130) × 100 = 800/13

According to the question, we get

[(M.P - C.P)/C,P] × 100

⇒ {[100 - (800/13)]/(800/13)} × 100

⇒ [(500/13)/(800/13)] × 100

⇒ 62.50%

**∴ The markup percentage on cost price is 62.50%.**