22. Вычислите: 3/4 + (−8 3/5 + 6/5 · 4 1/6) : 8/25.

\[\frac65\cdot4\frac16=\frac65\cdot\frac{25}{6}=5.\]

\[-8\frac35+5=-\frac{43}{5}+\frac{25}{5}=-\frac{18}{5}.\]

\[-\frac{18}{5}:\frac8{25}=-\frac{18}{5}\cdot\frac{25}{8}=-\frac{45}{4}.\]

\[\frac34-\frac{45}{4}=-\frac{42}{4}=-\frac{21}{2}.\]

Ответ: \(-\frac{21}{2}\).