Step-by-step explanation:
In total there is 6 cups of soup.
So lets put that in /8 form
48/8 and do the same to the other 27/8
So when you see it takes 27/8 for one you know she can only do one full serving.
21/8 is what's left
So 2 5/8 is left
She is 6/8 off of one more serving
I'm sorry this is all I can do. I hope you can use this info to answer