Gwen had 7 1/7 cups of flour. If she used 3 5/7 cups baking, how much flour did she have left

Gwen has 3 3/7 cups left

Step-by-step explanation:

To find this, first subtract the amount using whole numbers only.

7 - 3 = 4

Now do so with the fractions.

1/7 - 5/7 = - 4/7

Now add the two answers together.

4 - 4/7 = 3 3/7