Correct Answer - Option 3 : 66.66%

**Formula -**

Profit = Selling Price (S.P) - Cost Price (C.P)

% Profit = (Profit × 100) ÷ C.P

**Calculation - **

⇒ C.P = (60 × S.P) ÷ 100

⇒ or C.P ÷ S.P = 60 ÷ 100

⇒ C.P ÷ S.P = 3 ÷ 5

⇒ C.P = 3, S.P = 5

Profit = 5 - 3

⇒ Profit = 2

% Profit = (2 × 100) ÷ 3

⇒ % Profit = 200 ÷ 3

⇒ % Profit = 66.66%

**∴ The required answer is 66.66%**