When subtracting fractions, you should make sure they have the same denominator and turning them into an improper fraction. We should change 3 1/4 into a denominator of 8. 3 1/4 = 13/4 13/4 = 26/8 Now, let's subtract. 26/8 - 15/8 11/8 1 3/8 3 1/4 - 1 7/8 = 1 3/8
