\[3,(27) = 3 + 0,27 + 0,0027 + \ldots\]
\[q = 0,01;\ \ \]
\[b_{1} = 0,27;\]
\[S = \frac{0,27}{1 - 0,01} = \frac{0,27}{0,99} = \frac{3}{11}.\]
\[3,(27) = 3\frac{3}{11}\]