\[\boxed{\text{6.18.}}\]
\[\textbf{а)}\ \frac{4}{3} = 1\frac{1}{3};\ \]
\[\textbf{б)}\ \frac{37}{12} = 3\frac{1}{12};\ \]
\[\textbf{в)}\ \frac{41}{6} = 6\frac{5}{6};\ \]
\[\textbf{г)}\ \frac{263}{30} = 8\frac{23}{30};\ \]
\[\textbf{д)}\ \frac{503}{100} = 5\frac{3}{100}\text{.\ \ \ }\]