Question

By selling 8 pens Shayam loses equal to the cost price of 2 pens. Find his loss percent
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Answer 1

Let cost price(C.P). of 1 pen = 1 R.s
C.P of 2 pens be = 2 Rs.

Selling price of 8 pen = 2 Rs
selling price of 1 pen = 2/8 Rs

loss = 2/8 = 0.25
loss % =(loss/ C.P) x 100
= (0.25/1) x 100
=25 %

second method

Let, cost price of each pen=x
Selling price of each pen=y

Loss=8x-8y
2x=8x-8y
2/8=(x-y)/x
2/8*100=(x-y)/x*100
25%=loss percent