The cost price of a chair is three times of the profit earned on selling the chair. What is the approximate profit percentage gained through the sale?

33.33%

Cost price of a chair = 3(selling price of a chair-cost price of a chair)

Let's assume the cost price and selling price of a chair is CP and SP respectively.

CP = 3(SP-CP)

CP = 3SP-3CP

4CP = 3SP

SP : CP = 4 : 3

Profit % = \(\frac{4 - 3}{3}\) × 100 = 33.33%