Answer
9/8
Work Step by Step
In this problem, we are dividing by a fraction. However, we are never supposed to divide by a fraction. Rather, we must multiply by the reciprocal of the fraction. The reciprocal of a fraction is that fraction with the numerator (top of the fraction) and denominator (bottom of the fraction) switched. Thus, we simplify to find:
-9/10$\div$(-4/5)=-9/10$\times$(-5/4)=9/8
