Explanation:
a. When divided, -4/-5 will equal 4/5.
Negative Rule: When a negative number is divided by a negative number, the quotient is positive.
4/5 is the only correct option.
b. When divided, 3/-10 will still represent 3/-10.
Mixed Rule: When a positive number and a negative number divide, the quotient is negative.
-3/10 and (-3/10) are the correct choices. (First and Last)