tabelka

tab.tex

\documentclass[a4paper,10pt]{article}
\usepackage[MeX]{polski}
\usepackage[polish,english]{babel}
\selectlanguage{english}
\usepackage{graphicx}
\usepackage[utf8]{inputenc}
\usepackage{algorithmic}
\usepackage{verbatim}

%opening
\title{}
\author{}

\begin{document}

\maketitle

\begin{table}[h!]
\centering
\begin{tabular}{|c|c|c|c|}
\hline
a & \% b & \multicolumn{2}{|c|}{c} \\ \hline
& & d  & e  \\ \hline

1 & 100\% & 2 & 1  \\ \hline
2 & 90\% & 3 & 1  \\ \hline
3 & 80\% & 4 & 1  \\ \hline
4 & 70\% & 5 & 1  \\ \hline
5 & 60\% & 5 & 1 \\ \hline

\hline
\end{tabular}
\end{table}

\end{document}