\%The percent symbol is used to denote percentages, which are a way of expressing a number as a fraction of 100. In LaTeX, the percent symbol is also used to indicate comments, where anything following the percent symbol on that line is ignored by the compiler.
Represents 50 percent.
50\%Used in text to denote a percentage value.
\text{The interest rate is } 5\% \text{ per annum}Used to comment out text in a LaTeX document.
% This is a comment in LaTeX