Answer:
72 cupcakes
Step-by-step explanation:
Morgan can make 4 cupcakes with one cup of flour. She has 18 cups of flour and suppose she can make x cupcakes, then
1 cup of flour - 4 cupcakes
18 cups of flour - x cupcakes
Write a proportion:

Cross multiply:

When multiplying numbers, it doesn't matter which number is first or second.
The correct answer is: Commutative Property of Multiplication
The discount was 48%. The original price was $28.00, but the new price was $14.60.