Question

A dealer sold a camera for rs 1080 gaining 1/8 of it 's cost price of the camera andthe gain percent earned by the dealer

Answer 1

gaining 1/8 means, it is 135 rupees, gain percent= [135/1080]x 100= 12.5%, that's it

Answer 2

Selling price=1080, let cost price=C therefore gain=1/8C.
Selling price=C+1/8C=1080
Solving for C we have:9/8C=1080
Thus C=960 and gain =1/8*960=120
Percentage gain=120/960*100%=12.5%