[tex]0.135135135...=0.\overline{135}=0.(135)[/tex]
[tex]x=0.(135)\ \ \ \ |multiply\ both\ sides\ by\ 1000\\\\1000x=135.(135)\\\\1000x-x=135.(135)-0.(135)\\\\999x=135\ \ \ \ \ \ |divide\ both\ sides\ by\ 999\\\\x=\frac{135}{999}\\\\divide\ a\ numerator\ and\ a\ denominator\ by\ 27\\\\x=\frac{5}{37}[/tex]