I believe the answer you're looking for is 30% or 3/10
I don't know the root you are talking about but i would say "we might say that they are bulk"
The point-slope formula is y-y1=m(x-x1). You will then substitute into this equation. The answer will be y-2=-8(x+3).
If he sold 25 boxes in all and he sold 7 today then he would of sold 25 - 7 boxes yesterday. Josh sold 18 boxes yesterday.
Today = 7
Yesterday = 18
Total = 25
7 + x = 25, when x = Yesterdays sold boxes.
Hope this helps :)
For 5/8 it is .... 9/16
for 1/2 it is..... 2/3
