Creating a unique table

Question

Hi I am currently trying to create a table in latex that looks something like the table below:

So far I have been able to get this far but struggle to adjust the and Measure contribution header

\begin{center}
\begin{tabular}{|l|l|c|}
 \hline
\multicolumn{2}{|c|}{Element} & Measured Contribution\\
\hline
Magnesium & Mg & 23.124 \% \\
Aluminium & Al & 18.06  \% \\
Nitrogen & N & 8.423 \% \\
Osmium & Os & 0.00325 \% \\
\hline
\multicolumn{2}{c|}{} &\textbf{49.61025}   \% \\ \cline{3-3}
\end{tabular}
\end{center}

Please can someone help?

Answer 1

Four main suggestions:

• Use \phantom{0} inserts in data rows 3 and 4 to achieve alignment on the decimal markers of the numbers in the preceding two rows.

• Use a non-extended bold font face for the number in data row 5, so allow the digits to line up with the ones in the preceding rows. (Aside: if this were my table, I wouldn't bother bolding the number. Its stand-alone location suffices to give it a lot of visual prominence.)

• Let LaTeX do the work of inserting the % symbol at the far right.

• Use a centered version of the p column type to achieve an automatic line break in the "Measured Contribution" header cell.

\documentclass{article}
\usepackage{array}
\newcommand{\ubold}[1]{\fontseries{b}\selectfont#1}
\begin{document}
\begin{center}
\setlength\extrarowheight{2pt}
\begin{tabular}{|l|l|l@{\%\hspace{\tabcolsep}}|}
 \hline
\multicolumn{2}{|c|}{Element} &
\multicolumn{1}{>{\centering\arraybackslash}p{6em}|}{ Measured Contribution}\\
\hline
Magnesium & Mg & 23.124 \\
Aluminium & Al & 18.06   \\
Nitrogen  & N  & \phantom{0}8.423    \\
Osmium    & Os & \phantom{0}0.00325  \\
\hline
\multicolumn{2}{c|}{} & \ubold{49.61025} \\ 
\cline{3-3}
\end{tabular}
\end{center}
\end{document}