104. \( 4 \frac{8}{3} - 3 \frac{11}{2} \)

\( 4 \frac{8}{3} - 3 \frac{11}{2} = \frac{20}{3} - \frac{17}{2} = \frac{20 \cdot 2 - 17 \cdot 3}{6} = \frac{40 - 51}{6} = -\frac{11}{6} \)