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\documentclass{article}
\usepackage[nostamp]{moodle}
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\begin{document}

\section*{Introduction}

This document is intended to check the support of shortanswer questions.

\begin{quiz}{Example Quiz}

\begin{shortanswer}{Short Answer}
Enter the string \texttt{"40\%"}.
\item[fraction=100,feedback={correct \myequation}] 40\%
\item[fraction=50,feedback={incomplete \myequation}] 40
\item[fraction=50,feedback={incomplete \myequation}] \%
\end{shortanswer}
\begin{cloze}{Short Answer in Cloze}
\begin{shortanswer}
Enter the string \texttt{"40\%"}.
\item[fraction=100,feedback={correct \myequation}] 40\%
\item[fraction=50,feedback={incomplete \myequation}] 40
\item[fraction=50,feedback={incomplete \myequation}] \%
\end{shortanswer}
\end{cloze}

\end{quiz}
\end{document}