To solve for \( y \) in the equation
\[ -15 = -\frac{3}{5} y, \]
you can follow these steps:
- Multiply both sides of the equation by \(-1\) to eliminate the negative sign:
\[ 15 = \frac{3}{5} y. \]
- To isolate \( y \), multiply both sides by the reciprocal of \(\frac{3}{5}\), which is \(\frac{5}{3}\):
\[ y = 15 \cdot \frac{5}{3}. \]
- Calculate the right side:
\[ y = \frac{15 \cdot 5}{3} = \frac{75}{3} = 25. \]
So,
\[ y = 25. \]