Answer:
5 1/4 cups of flour
Step-by-step explanation:
Each cake requires = 3 1/4 cups of flour
She has = 15 cups of flour
She made 3 cakes
Number of flour used for 3 cakes = 3 1/4 cups of flour × 3
= 13/4 × 3
= 39/4
= 9 3/4 cups of flour
Flour remaining = Total flour - used flour
= 15 - 39/4
= 60-39/4
= 21/4
= 5 1/4 cups of flour
