After allowing a discount of 20%, a radio is available for

After allowing a discount of 20%, a radio is available for Rs. 1200. Its marked price was :

Let the marked price of radio be Rs. x.
According to the question,
80% of x = 1200

⇒	x × 80	= 1200
	100

Second Method : Here, D = 20%, S.P. = Rs. 1200, M.P. = ?

M.P. =	S.P. × 100
	100 − D

=	1200 × 100
	100 − 20

M.P. =	120000
	80

M.P. = Rs. 1500