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Question

A shopkeeper marks his goods at 30 percent above the cost price and then gives a discount of 10 percent. Find his gain percent.

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Solution

Let C.P. of the goods = Rs.100
M.P. of the goods = Rs. 100+ Rs.30
= Rs.130
Discount = 10100× Rs.130
= Rs. 1300100
= Rs. 13
S.P. of the goods = M.P. - Discount
= Rs.130- Rs.13
= Rs.117
Gain = S.P. - C.P.
= Rs. 117 - Rs.100
= R.17
Gain% = GainC.P.×100
= 17100×100
= 17%


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