For the sake of variety, here's a LuaLaTeX-based solution. It sets up a user macro called `\myPerCent` which takes 2 mandatory arguments -- the numerator and denominator terms of the ratio to be computed -- as well as 1 optional argument -- the desired precision or number of significant digits. 

Two remarks about this solution: 

 - The macro's default number of significant digits is `3`. This can be overridden by specifying an optional argument, enclosed in square brackets, ahead of the 2 mandatory arguments. See the sample code below for details.

 - The 2 mandatory arguments of `\myPerCent` don't have to be numbers. They can also be expressions that to *evaluate* to numbers using standard math and LaTeX syntax rules.

[![enter image description here][1]][1]

    % !TEX TS-program = lualatex
    \documentclass{article}
    \usepackage{luacode} % for '\luaexec' macro
    \newcommand{\myPerCent}[3][3]{\luaexec{%
       tex.sprint( 100 * string.format("\%.#1g" , (#2)/(#3)) )
       }\,\%}
       
    \begin{document}

    \myPerCent{2441}{8667}, \myPerCent[6]{2441}{8667}.
    
    \myPerCent[1]{10/2}{2*3}, \myPerCent[5]{10/2}{2*3}.
    
    \def\myten{10}\def\myfive{5} \myPerCent{\myfive}{\myten}.

    \end{document}


  [1]: https://i.sstatic.net/65EdPh2B.png