Jamie and Alex are making smoothies for a party. Jamie uses a recipe that requires 3/4 of a cup of yogurt for each smoothie. Alex has a recipe that calls for 2/5 of a cup of yogurt for each smoothie. If Jamie decides to make 12 smoothies and Alex chooses to make 15, how many total cups of yogurt do they use combined?

To find the total cups of yogurt needed for each person, calculate the amount of yogurt they need separately and then add the two amounts together.