Answer:

Explanation:
Unit rate is defined as the rate are expressed as a quantity as 1 such as 3 meter per second or 4 miles per hour.
As per the statement:
4/5 cup servings are in 4/9 of a cup of yogurt
then by definition of unit rate:

Simplify:

therefore, 4/5 cup servings are in 4/9 of a cup of yogurt is,
cup of yogurt