Answer:
The bake star bakery uses 0.5625 cup per serving
Explanation:
We can use proportion to solve the question
Let x represent the number of cups in 1 serving
2.25 cups = 4 servings
x = 1 serving
Cross-multiply
4x = 2.25
Divide both-side of the equation by 4
=

( On the left-hand side of the equation 4 on the numerator will cancel-out 4 on the denominator while on the left-hand side of the equation 2.25 will be divided by 4)
x =

x = 0.5625 cup
Therefore the bake star bakery uses 0.5625 cup per serving