this is very easy. you already have the common denominator: 3 2/3 and 2 2/3 both have 3 as their common denominator. then just add it normally: 3 2/3 + 2 2/3= 5 4/3 see how its 4 over 3? that means you have to make another whole: 6 1/3 if u have any questions feel free to ask me!