6) (23 5/6 − 50) : (54,3 − 70)

\(23\frac{5}{6}-50=\frac{143}{6}-\frac{300}{6}=-\frac{157}{6}\).

\(54{,}3-70=-15{,}7=-\frac{157}{10}\).

\(\left(-\frac{157}{6}\right):\left(-\frac{157}{10}\right)=\frac{10}{6}=\frac{5}{3}\).

Ответ: \(\frac{5}{3}\).