The marked price of an electric iron is ₹ 690. The shopkeeper

The marked price of an electric iron is ₹ 690. The shopkeeper allows a discount of 10% and gains 8%. If no discount is allowed, his gain percent would be

Given in question , Marked price = ₹ 690
∴ Discount = 10%

SP =	690 × 90	= ₹ 621
	100

Profit = 8%

∴ CP =	621	× 100 = ₹ 575
	108

Profit without discount = 690 – 575 = ₹ 115

Profit percent =	115	× 100 = 20%
	575

Using the given formula , we can find required answer :
Here, r = 10%, R = 20%

Required percentage =	(r + R)	× 100%
	100 − r

Required percentage =	10 + 20	× 100%
	100 − 10

Required percentage =	30	× 100%
	90

Required percentage = 33	1	%
	3

Gain = S.P. - C.P. = 480 − 400 = ₹ 80

Gain % =	Gain	× 100 (without discount)
	C.P.

=	80	× 100 = 20%
	400

We can find required answer with the help of given formula :
Here, M.P. = ₹ 690 , D = 10% , r = 8%

M.P.	=	100 + r
C.P.	=	100 − D

690	=	100 + 8
C.P.	=	100 − 10

690	=	108
C.P.	=	90

C.P. =	690 × 90	= ₹ 575
	108

Gain % (without discount) =	690 × 575	× 100%
	575

Gain % =	115	× 100% = 20%
	575