Definition:Percentage

Definition
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.