Does this seem perfect:- 33.3̅ ? Just type an 33.3U+0305 in Libreoffice Writer / Any word processor and Alt+X. Copy 33.3̅ , paste it on the text editor, and you will get this :-

The symbol has a Unicode code point:

U+A751 LATIN SMALL LETTER P WITH STROKE THROUGH DESCENDER

There are some (at least) text fonts, which do provide the symbol. Example for LuaTeX/XeTeX:

\documentclass{article}
\usepackage{booktabs}
\usepackage{fontspec}
\newfontfamily\DejaVuSans{DejaVu Sans}
\newcommand*{\Rows}{}
\makeatletter
\newcommand*{\TestFamily}[1]{%
  \expandafter\newfontfamily\csname FONT@#1\endcsname{#1}%
  \g@addto@macro\Rows{\RowFamily{#1}}%
}
\newcommand*{\TestSingle}[1]{%
  \expandafter\newfontfamily\csname FONT@#1\endcsname{#1}%
  \g@addto@macro\Rows{\RowSingle{#1}}%
}
\newcommand*{\RowFamily}[1]{%
  #1 & \csname FONT@#1\endcsname\symbol{"A751}
     & \csname FONT@#1\endcsname\bfseries\symbol{"A751}
     & \csname FONT@#1\endcsname\itshape\symbol{"A751}
     & \csname FONT@#1\endcsname\bfseries\itshape\symbol{"A751}
  \tabularnewline
}
\newcommand*{\RowSingle}[1]{%
  #1 & \csname FONT@#1\endcsname\symbol{"A751}
  \tabularnewline
}
\TestFamily{DejaVu Sans}
\TestSingle{Quivira}
\TestFamily{Segoe UI}
\TestFamily{FreeSerif}
\makeatother
\begin{document}
\begin{tabular}{lllll}
  \toprule
  Name & Regular & Bold & Italic & Bold Italic\\
  \midrule
  \Rows
  \bottomrule
\end{tabular}
\end{document}

The symbol could then be used inside math via \text{\symbol{"A751}} (package amstext or amsmath).