Question

A student buys a pen for ₹90 and sells it for ₹100 find his gain and gain percent.​

Answer 1

For student :

Cost price of pen=Rs. 90

Selling price of pen=Rs. 100

Since, SP>CP.

Hence, 

Gain=SP−CP=100−90=Rs. 10

So,

Gain(%)=CPgain×100=9010×100=1191

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Answer 2

Answer:

sp-cp

100-90

10

gain%=profile/cost price×100

gain= 10/90×100

gain = 100/9

gain= 11.11%

your answer..........