$\frac{\sqrt{48}}{\sqrt{3}}=\sqrt{\frac{48}{3}}=\sqrt{16}=4$

$\frac{\sqrt{150}}{\sqrt{6}}=\sqrt{\frac{150}{6}}=\sqrt{25}=5$

$\frac{\sqrt{6,3}}{\sqrt{0,7}}=\sqrt{\frac{6,3}{0,7}}=\sqrt{\frac{63}{7}}=\sqrt{9}=3$

$\frac{\sqrt{98}}{\sqrt{242}}=\sqrt{\frac{98}{242}}=\sqrt{\frac{49}{121}}=\frac{7}{11}$

$\frac{\sqrt{6}\ast <!--\; \ast \; -->\sqrt{2}}{\sqrt{3}}=\frac{\sqrt{6\ast <!--\; \ast \; -->2}}{\sqrt{3}}=\frac{\sqrt{12}}{\sqrt{3}}=\sqrt{\frac{12}{3}}=\sqrt{4}=2$