To find the quotient of \( 100 \div (-10) \div 5 \), we can perform the divisions step by step.
First, calculate \( 100 \div (-10) \):
\[ 100 \div (-10) = -10 \]
Next, take the result and divide it by \( 5 \):
\[ -10 \div 5 = -2 \]
Thus, the final result is:
\[ \boxed{-2} \]