Решение:
\[ \frac{5}{9} - \frac{5}{5} = \frac{5}{9} - 1 = \frac{5}{9} - \frac{9}{9} = \frac{5-9}{9} = -\frac{4}{9} \]
\[ \frac{7}{3} \times \left( -\frac{4}{9} \right) = -\frac{7 \times 4}{3 \times 9} = -\frac{28}{27} \]
Ответ:
\[ -\frac{28}{27} \]