107. \( 7 \frac{5}{6} - 9 \frac{14}{21} \)

\( 7 \frac{5}{6} - 9 \frac{14}{21} = 7 \frac{5}{6} - 9 \frac{2}{3} = \frac{47}{6} - \frac{29}{3} = \frac{47 - 58}{6} = -\frac{11}{6} \)