\[\boxed{\mathbf{1}\mathbf{.}}\]
\[1)\ \frac{2}{3} = 0,66\ldots = 0,(6)\]
\[2)\frac{8}{11} = 0,72\ldots = 0,(72)\]
\[3)\ \frac{3}{5} = 30\ :5 = 0,6\]
\[4)\ \ - \frac{3}{4} = - 3,75\]
\[5)\ - 8\frac{2}{7} = - 8,285714\ldots =\]
\[= - 8,(285714)\]
\[6)\ \frac{13}{99} = 0,13\ldots = 0,(13)\]