\begin{table}[htp] 
\centering
\caption{tab1}
\renewcommand*{\arraystretch}{1.5}
\begin{tabular}{|p{1.5cm}|p{1.5cm}|p{1.5cm}|p{1.5cm}|p{1.5cm}| }
\hline
$ \frac{A_{i}}{B_{i}} $ & $ \frac{\sum\limits_{i=1}^{5}A_{i}}{\sum\limits_{i=1}^{5}B_{i}} $ & $ \sum\limits_{i=1}^{5}B_{i} $ & $ \sum\limits_{i=1}^{5}A_{i} $& $i $ \\
\hline
$0$ & $0$ & 1 & 1 & 1 \\
\hline
$0$ & $0$ & $\frac{1}{2}$ & 2 & 2 \\
\hline
3 & $\frac{1}{2}$ & $\frac{3}{4}$ & 1 & 3 \\
\hline
4 & 1 & 6 & 5 & 4 \\
\hline
\end{tabular}
\end{table}\\