A tradesman marks his goods at 20 % above the cost price.

A tradesman marks his goods at 20 % above the cost price. He allows his customers a discount of 8% on the marked price. Then his profit % is

Let the C.P. of article be Rs. 100,
According to the questions
Marked price of article = Rs. 120
After a discount of 8%,

S.P. =		120 × 92
		100

= Rs. 110.4 Gain
= Rs. (110.4 – 100) = Rs. 10.4
∴ Gain % = 10.4%
2nd method to solve this question.
Here, r = 20%, r₁ = 8%

⇒ Gain % =	r × (100 − r₁)	− r₁
	100

Gain % =	20 × (100 − 8)	− 8
	100

Gain % =	20 × 92	− 8
	100

Required Gain % = 18.4 – 8 = 10.4%