Since $\frac{522}{725}$ and $\frac{300}{725}$ have the same denominator, subtract them by subtracting their numerators.
$$sort(-\frac{1223}{20},\frac{522-300}{725})$$
Subtract $300$ from $522$ to get $222$.
$$sort(-\frac{1223}{20},\frac{222}{725})$$
Least common denominator of the numbers in the list $-\frac{1223}{20},\frac{222}{725}$ is $2900$. Convert numbers in the list to fractions with denominator $2900$.