A merchant marks an article 20% above cost price. He then

A merchant marks an article 20% above cost price. He then sells it at a discount of 20%. The sale gives him :

Let the C.P. of article be Rs. 100.
According to the question,
Marked price of article = Rs. 120
at 20% discount ,

S.P. of article = Rs.		120 × 80		= Rs. 96
		100

Loss = C.P. of article - S.P. of article = 100 - 96 = Rs. 4

∴ Loss percent =	Loss	× 100
	C.P.

Loss percent =	4	× 100 = 4%
	100