Brett is making a fruit salad. the recipe calls for 1 1 2 cups of apple, 3 4 cup of oranges, and 2 3 cup of grapes. how many cups of fruit salad will brett’s recipe make?

Well you ha've to add them all together. the common denominator of 3 4 and 2 would be 12. 12 is the first multiple they all share. So lets change them.
1 1/2 = 3/2 * 6/6 = 18/12

3/4 * 3/3 = 9/12

2/3 * 4/4 = 8/12

add all the cups to get the total cups of salad

18/12 + 9/12 + 8/12 = 34/12 = 2 10/12 = 2 5/6