a vendor bought toffees at 6 for a rupee . how many for a rupee must he sell to gain 80 % ?
"c . p . of 6 toffees = re . 1 s . p . of 6 toffees = 480 % of re . 1 = rs . 24 / 5 for rs . 24 / 5 , toffees sold = 6 . for re . 1 , toffees sold = 6 x 24 / 5 = 28.8 . answer c"
multiply(6, add(const_1, divide(80, const_100)))