How many 3/4 servings of cereal can be made from a box containing 11 1/4 cups?

You can start finding this equation by making 11 1/4 into an improper fraction, which would be 45/4. You then divide that by 3/4, which would be to multiply 45/4 by 3/4's reciprocal, 4/3. The answer would end up being 45/3 or 15.