I'd like to have two tables side by side. How can I do that? These are the tables
\begin{table} [h!] \centering
\begin{tabularx}{0.5\textwidth}{|c|X|X|}
\hline
& Sensibilità [$\%$] & Specificità [$\%$]\\
\hline
$\epsilon '$ & 53.492 & 77.906 \\ \hline
$\epsilon ''$ & 46.753 & 61.587\\
\hline
\end{tabularx}
\caption[Valori medi]{valori medi}
\end{table}
\begin{table} [h!] \centering
\begin{tabularx}{0.5\textwidth}{|c|X|X|}
\hline
& Sensibilità [$\%$] & Specificità [$\%$]\\
\hline
$\epsilon '$ & 60 & 80.487 \\ \hline
$\epsilon ''$ & 54.545 & 67.777\\
\hline
\end{tabularx}
\caption[Valori medi]{valori medi}
\end{table}
floats this way. You can use two tabular environments in the sametableenvironment, each one having a caption. And don't post such fragments only – Jul 11 '16 at 10:27