You may want to review multiplying fractions first.
To divide two fractions, just flip the second one (not the first one). Leave the sign alone, if it has one. Then multiply them. For example, if you have to divide −1 by −1 ⁄ 2, you flip the second fraction, so it becomes −2 ⁄ 1. Then, you multiply −1 by −2 ⁄ 1, which gives you your answer, 2.
What if the second fraction is really a whole number, so there's norhing to flip? Again, remember that a whole number is the same as a fraction whose denominator is 1. So, if you have to divide −8 ⁄ 3 by 2, you can rewrite 2 as 2 ⁄ 1. Then you can flip it, getting 1 ⁄ 2. Multiplying −8 ⁄ 3 by 1 ⁄ 2 gives you −4 ⁄ 3, so that's your answer.
If the second fraction is 0, then there's no answer, because you can never divide by 0. On this site, if you're asked to divide by 0, you should check the box marked “Undefined”. Your teacher may want you to write something else instead. Whatever you do, though, don't write a number; it's guaranteed to be wrong!