Question

A hawker sells 100 candies for 5 rupees. If he manages to makes a profit of 20%, how many candies did he buy for a rupee?

Answer 1

Rs. 5 = 100 candies
it means,
Rs. 1 = 20 candies
I mean to say if he sell candy at 100% then buy with a profit.
so he buy 100 + 20 % =120%
so,
he sell 20 candies in one repuu means,
20 candies = 120%
20/120 candies = 1%
20/120*100 candies = 100%
16.667 candies = 100%
Hence,
he buy 16 candies in one rupees
we know that he can't buy 16.667 candies because 0.667 candies are not include in this
so he buy 16 candies in one rupee