Ответ:

\(2\frac{2}{9}=\frac{20}{9}\).

\(\frac{4}{5}:\frac{20}{9}=\frac{4}{5}\cdot\frac{9}{20}=\frac{9}{25}\).

\(1-\frac{9}{25}=\frac{16}{25}=0.64\).

Ответ: 0,64.