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."

Examples
$$\frac 1 2$$ as expressed in percentage form as $$\frac 1 2 \times 100 = 50 \%$$.

$$1.2$$ can be expressed in percentage form as $$1.2 \times 100 = 120 \%$$.

Linguistic note
"Centum" is Latin for $$100$$. So "per cent" merely means "per hundred".

Thus, for example $$68 \%$$ can be read and interpreted as "sixty eight per hundred".

That is, sixty eight out of 100, or $$\frac {68} {100}$$.