Fraction $\frac{-2}{3}$ can be rewritten as $-\frac{2}{3}$ by extracting the negative sign.
$$sort(\frac{9}{4},-\frac{2}{3})$$
Least common denominator of the numbers in the list $\frac{9}{4},-\frac{2}{3}$ is $12$. Convert numbers in the list to fractions with denominator $12$.
$$\frac{27}{12},-\frac{8}{12}$$
To sort the list, start from a single element $\frac{27}{12}$.
$$\frac{27}{12}$$
Insert $-\frac{8}{12}$ to the appropriate location in the new list.
$$-\frac{8}{12},\frac{27}{12}$$
Replace the obtained fractions with the initial values.
