If the selling price of a TV set is equal to of its cost price, find the gain per cent.
Hint. Let CP be x. Then, SP =Rs.
Let × be the CP of TV Set
CP = x
SP = (x) × 6/5
= 6x/5
Gain = SP –CP
= 6x/5 – x
= x/5
= (x/5 × 100) / x
= 20%
So, If TV set is sold at 6/5 price of its CP. Then Gain percent will be 20%.