First change the mixed fraction to an improper fraction. -4 1/3 is -13/3 and Then divide by -3/4. *Remember dividing by a fraction is really multiplying by its inverse.
So -13/3 ➗-3/4 is -13/3 ✖️-4/3= 52/9 ( note negative ✖️negative = positive) 52/9 simplified becomes 5 7/9