Question

a retailer marks his goods 25% above cp and also gives a discount of 10%. find his gain%

Answer 1

let the cp be rs 100
mp = rs  125
discount = 10% of mp = rs 12.5
sp = mp - discount
    = 125- 12.5
     = 112.5
gain = sp - cp
        = 112.5 - 100
        = rs 12.5
g% = g/cp x 100
       = 12.5/100x 100
       12.5%

Answer 2

this is your answer hope it will help