Step 1: Let's review the information given to us to answer the problem correctly:
Paint we have: 3/4 of a gallon of white paint and 1/8 of a gallon of blue paint
Step 2: The paint is from different colors, therefore:
It was left 1/8 of a gallon of blue paint and 3/4 of a gallon of white paint.
Step 3: The question is asking this:
3/4 - 1/8 = ?
3/4 = 6/8
Therefore,
6/8 - 1/8 = 5/8 more white paint