To solve for \( h \) in the equation
\[ \frac{h}{-3} = 3.7, \]
you can multiply both sides of the equation by -3 to isolate \( h \):
\[ h = 3.7 \times (-3). \]
Now calculate the right side:
\[ h = -11.1. \]
Thus, the solution for \( h \) is
\[ \boxed{-11.1}. \]