4/8 is left in her glass.
Step 1–find the common denominator (which is 8)
Step 2–multiply 3/4 times 2 which will give you 6/8
Step 3– Add 6/8 and 3/8 which will give you an improper fraction of 9/8
Step 4–Subtract 5/8 from 9/8
Therefore your answer is 4/8