Question

a men buys a book for rs 80 and sell it for rs 100 his gain is​

Answer 1

Answer:

He gain 20

Step-by-step explanation:

100-80 we get 20 so he gain 20 rs

Answer 2

Answer:

25%

Step-by-step explanation:

Cost price of book =Rs.80

Selling price of book =Rs.100

Since (SP)>(CP), so there is a gain

Gain =(SP)−(CP)

=Rs.(100−80)

=Rs.20

Gain %={(gain/CP)×100}

={20/80)×100}

={20/20)×25}

=25%