4: ( -0.8 ) - ( 2 - 1 1/3 )

First, let's convert the mixed number to a improper fraction:

1 1/3 = 3/3 + 1/3 = 4/3

Now we can subtract:

-0.8 - (2 - 4/3)
= -0.8 - (6/3 - 4/3)
= -0.8 - 2/3
= -0.8 - 0.67
= -1.47

Therefore, 4: ( -0.8 ) - ( 2 - 1 1/3 ) is equal to -1.47.