\input{./vars}

\begin{document}
\begin{tabular}{|l|r|r|}
\hline
\textbf{Ingredient}    & \multicolumn{1}{l|}{\textbf{Percent}} & \multicolumn{1}{l|}{\textbf{Calculation}}  \\ \hline
1000g flour            & 100\%                                     & 1000g of 1000g = 100\%                     \\ \hline
600g water             & 60\%                                      & 600g of 1000g = 60\%                       \\ \hline
100g sourdough starter & 10\%                                      & 100g of 1000g = 10\%                       \\ \hline
20g salt               & 2\%                                       & 20g of 1000g = 2\%                         \\ \hline
\end{tabular}
\end{document}