63. \(2\frac{2}{3} \cdot \frac{9}{16} - \frac{7}{24} : \frac{2}{7}\)

\(2\frac{2}{3} \cdot \frac{9}{16} - \frac{7}{24} : \frac{2}{7} = \frac{8}{3} \cdot \frac{9}{16} - \frac{7}{24} \cdot \frac{7}{2} = \frac{8 \cdot 9}{3 \cdot 16} - \frac{7 \cdot 7}{24 \cdot 2} = \frac{1 \cdot 3}{1 \cdot 2} - \frac{49}{48} = \frac{3}{2} - \frac{49}{48} = \frac{72}{48} - \frac{49}{48} = \frac{23}{48}\) Ответ: \(\frac{23}{48}\)