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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.


Example: $50 \%$

$\dfrac 1 2$ as expressed in percentage form as:

$\dfrac 1 2 \times 100 = 50 \%$

Example: $120 \%$

$1.2$ can be expressed in percentage form as:

$1.2 \times 100 = 120 \%$

Also see

  • Results about percentages can be found here.

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 $\dfrac {68} {100}$.