Do you want to find the unit price? Because if you do, one tub of frosting would cost $0.83 (83 cents). It’s rounded btw because the answer is 0.83333 but i think you have to round it.
You just have to add the three
4/8+3/8+1/8=8/8
8/8=100%
So they finished the whole project
Hope this helps!