A trader allows a discount of 10% on the marked price. He still has a profit of 17% on the cost price. Find the profit percentage. If he sells at the marked price = ?

Answer: Option C

Let the Marked price = Rs. 100
10% discount price will be = Rs. 90
$$17\%\text{ of }90=\frac{17\times 100}{90}\approx 20$$
∴ Cost price ≈ 90 - 20 ≈ 70
If the product is sell on marked price , then profit will be ≈ 30%