Question

While selling 15 copies a man gains the cost price of 5 copies, findet
profit percent.​

Answer 1

Step-by-step explanation:

no. of copies=15

profit gain=5

change in amount /original amount×100

5/15×100

500/15

=100/3

33.3% gained

I hope it is correct

Answer 2

Answer:

If the price is p and the cost is c, then

15p = 20c

p/c = 20/15 = 1.333

so, he made 33% profit