\begin{definition}[Definition:Percentage]
A '''percentage''' is a convenient way of expressing (usually) a fraction as an easily-grasped number, by multiplying it by $100$ and appending the symbol $\%$ which means '''per cent'''.
As conventionally understood, the number being rendered as a '''percentage''' is between $0$ and $1$, thus determining the range of a '''percentage''' to be $0 \%$ to $100 \%$.
However in many contexts that range is frequently extended (in particular, in the field of rhetoric):
:''I want every member of this team to give one hundred and ten percent.''
\end{definition}