What is 5 8/12 plus 3 5/12

First add the whole numbers;

5 + 3 = 8

then add the numerators (you could add them cause they have like denominators);

8/12 + 5/12 = (8+5) = 13/12

13/12 = 1 1/2

so your final answer would be: 9 1/2 (I added the whole numbers)