Answer:
Both of them are right 
The amount of carpet needed is 189 7/8 feet 
Explanation:
Here, we want to get the person with the right calculations step between Michael and Tracy 
From what we can see in the question, both exactly have the same calculations 
They only differ in the number to put first 
So we can say both are right 
The amount of carpet needed will be;
12 1/4 * 15 1/2 
= 49/4 * 31/2 = 1519/8
= 189 7/8 square feet