Ответ:

\(\frac{1}{12}:\left(1\frac{13}{18}-2\frac{5}{9}\right)=\frac{1}{12}:\left(\frac{31}{18}-\frac{46}{18}\right)=\frac{1}{12}:\left(-\frac{5}{6}\right)\).

\(\frac{1}{12}\cdot\left(-\frac{6}{5}\right)=-\frac{1}{10}\).

Ответ: \(-\frac{1}{10}\).