documentclass{article}
usepackage{booktabs}
begin{document}

begin{table}
    centering
        begin{tabular}{@{}rrrr@{}}toprule
            Col1 & Col2 & Col3 & Col4\ midrule
            10% & 20% & 30% & 40%\
            5    &  6   &  7   &  8  \
          115    &116   &117   &118  \
            bottomrule
        end{tabular}
end{table}

end{document}