"(-3 3/9)-(2 1/6)= "

"-3 3/9 - 2 1/6 = -3 3/9 - 2 1/6 = -3 1/3 - 2 1/6 = -3 - 2 - 1/3 - 1/6 = -5 - 1/3 - 1/6 = -5 - 2/6 - 1/6 = -5 - 3/6 = -5 - 1/2 = -5 - 0.5 = -5.5"