Determine the sum of the two fractions: 8) $-1 \frac{3}{18}+\frac{5}{6}$

Step 1 ：Convert the mixed number to an improper fraction. The mixed number is \(-1 \frac{3}{18}\), which can be converted to \(-\frac{7}{6}\).

Step 2 ：Simplify the fractions if possible. The fractions are \(-\frac{7}{6}\) and \(\frac{5}{6}\). They are already in their simplest form.

Step 3 ：Add the two fractions together. \(-\frac{7}{6} + \frac{5}{6} = -\frac{1}{3}\).

Step 4 ：The sum of the two fractions is \(\boxed{-\frac{1}{3}}\).