\begin{definition}[Definition:Separation of Ratio]
Let $R = a : b$ be a ratio.
Then the '''separation of $R$''' is the ratio $a - b : b$.
{{EuclidSaid}}
:''{{Definition:Euclid's Definitions - Book V/15 - Separation of Ratio}}
{{EuclidDefRefNocat|V|15|Separation of Ratio}}
Category:Definitions/Euclidean Algebra
\end{definition}