41:63 2 4

$$4\frac{1}{2} \div 6\frac{3}{4} = \frac{9}{2} \div \frac{27}{4} = \frac{9}{2} \cdot \frac{4}{27} = \frac{9 \cdot 4}{2 \cdot 27} = \frac{36}{54} = \frac{2}{3}$$

Ответ: $$\frac{2}{3}$$.