Answer
$\frac{-25}{-21+16}$= 5
Work Step by Step
"The quotient" means this expression can be written as a fraction. "Of -25 and the sum of -21 and 16" means than -25 goes on the top and (-21+16) goes on the bottom.
$\frac{-25}{-21+16}$=$\frac{-25}{-5}$=5