Add.

7 2/15 + 5 2/3 + 9 13/15

20 2/3

21 10/15

21 2/3

22 2/3

7 2/15 + 5 2/3 + 9 13/15

The only one that needs to be changed a little is 5 2/3 so that it will also have 15 as a denominator.

5 2/3 * 5/5 = 5 10/15

7 2/15 + 5 10/15 + 9 13/15

12 12/15 + 9 13/15

21 25/15

21 25/15

We can simplify this a bit further by dividing the fraction by 5.

21 25/15 = 21 5/3

21 5/3

Now change the improper fraction into a mixed fraction and add the whole number to the current whole number.

5/3 = 1 2/3

21 + 1 2/3 = 22 2/3

The answer is

D. 22 2/3