How many more cups of chocolate chips than walnuts are needed?

chocolate chips: 2 2/3
walnuts: 7/8

2 1/4 cups more chocolate chips than walnuts are needed.

2 2/3 - 7/8 = 8/3 - 7/8 = 64/24 - 21/24 = 43/24 = 1 19/24