Question

Anant bought toffees at 5 for a rupee. How many for a rupee must he sell to gain 25%?

Answer 1

C.P. of 5 toffees  = Rs.1

S.P. of 5 toffees 
= `((100 + "Profit"%)/100)` of C.P.

= `((100 + 25)/(100))` x Rs.1

= 125% x Rs.1

= Rs.`(5)/(4)`

For Rs.`(5)/(4)`, toffees sold = 5

For Rs. 1, toffees sold = `(5 xx 4/5)` = 4

Hence, 4 toffees were sold to gain 25%.