To solve the given expression, we need to simplify the ratio of two fractions. The expression can be interpreted as a division of two fractions. We will first simplify each fraction separately and then perform the division.
Step 1: Simplify the First Fraction
Given the first fraction:
\[
\frac{3(x-y)^2}{5}
\]
Step 2: Simplify the Second Fraction
Given the second fraction:
\[
\frac{10(x-y)}{x+y}
\]
Step 3: Perform the Division of the Two Fractions
To divide the two fractions, we multiply the first fraction by the reciprocal of the second fraction:
\[
\frac{\frac{3(x-y)^2}{5}}{\frac{10(x-y)}{x+y}} = \frac{3(x-y)^2}{5} \times \frac{x+y}{10(x-y)}
\]