8 dozen is 24/3
3 1/3 dozen is 10/3
24/3 minus 10/3 = 14/3
14/3 is 4 2/3
The answer is 4 2/3 dozen left
Or to calculate on just cookies
8 dozen cookies is 96 cookies (8 x 12 = 96)
3 1/3 dozen cookies is 40 cookies (3 x 12 + 4 = 40)
96-40 = 56 cookies left