Tate fills a 13 1/3 ounce glass from a 21 2/3 ounce bottle of juice. how much juice is left in the bottle?

so first you can do it 21-13 then you get 8 after you subtract 2/3 - 1/3 and you get one third you don't have some the fraction into a common denominator because it is already the same. so therefore the answer is 8 1/3

8 1/3

13

- 21 = 8

2/3

- 1/3 = 1/3

8 1/3