Р) −4 3/7 · 0,375 : 7,75 · (−0,9) : 1 13/15 : (−3/5)²

Преобразуем числа: \(-4\frac{3}{7}=-\frac{31}{7}\), \(0.375=\frac{3}{8}\), \(7.75=\frac{31}{4}\), \(-0.9=-\frac{9}{10}\), \(1\frac{13}{15}=\frac{28}{15}\), \(\left(-\frac35\right)^2=\frac{9}{25}\).

\[-\frac{31}{7}\cdot\frac38:\frac{31}{4}\cdot\left(-\frac9{10}\right):\frac{28}{15}:\frac9{25}=\frac{25}{196}.\]

Ответ: \(\frac{25}{196}\).