Solve for n
\left\{\begin{matrix}n=\frac{p}{q}\text{, }&q\neq 0\\n\in \mathrm{R}\text{, }&p=0\text{ and }q=0\end{matrix}\right.
Solve for p
p=nq
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nq=p
Swap sides so that all variable terms are on the left hand side.
qn=p
The equation is in standard form.
\frac{qn}{q}=\frac{p}{q}
Divide both sides by q.
n=\frac{p}{q}
Dividing by q undoes the multiplication by q.
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