You would have to do 5/8 + 3/4.
In order to add fractions, you must have a common denominator. The least common denominator between 4 and 8 would be 8, since 4 can go into 8. So 3/4 = x/8. You multiplied 4 x 2 in order to get the denominator of 8 for the new fraction, and whatever you do to the bottom you do to the top. 3 x 2=6. So you’re new fraction is 6/8. You would add 5/8 + 6/8 to get 11/8 cups. This should definitely be right.
