I have the following table, I would like to vertical align the content but I cannot solve the problem with the suggestions I have found online. can you help me?
\begin{table}[]
\begin{center}
\caption{My caption}
\label{my-label}
\begin{tabular}{ | >{\centering}p{2.75cm} | >{\centering}p{1.75cm} | >{\centering}p{1.75cm} | >{\centering}p{1.75cm} | }
\hline\hline
\textbf{Title / Title} & \textbf{X} & \textbf{Y} & \textbf{Z} \\[5pt] \tabularnewline\hline\
\textbf{A} & a\% & b\% & c\%\\[5pt] \tabularnewline\hline
\textbf{B} & d\% & e\% & f\%\\[5pt] \tabularnewline\hline
\textbf{C} & g\% & h\% & i\%\\[5pt] \tabularnewline\hline
\textbf{D} & j\% & k\% & l\%\\[5pt] \tabularnewline\hline
\end{tabular}
\end{center}
\end{table}

tabularis essentially a\halignwhich arranges the horizontal alignment of cells. – David Carlisle Feb 18 '17 at 14:33\setlength\extrarowheight{2pt}to add a bit of space above the entries. You don't really want vertical centering otherwise for example the letters with descenders such as g would be out of line with those without such as a. – David Carlisle Feb 18 '17 at 15:00