We can go two ways.
4 + 2 = 6
4/5 + 1/3 = 12/15 + 5/15 = 17/15 = 1 2/15
We already have 6, so 6 + 1 2/15 = 7 2/15
Or, we can turn both into an improper fraction first...
4 4/5 + 2 1/3 = 24/5 + 7/3 = 72/15 + 35/15 = 107/15 = 7 2/15
Hope this helps!