Question

By what rational number should $$-3$$ is divided to get $$-9/13$$?

Answer 1

The required number can be calculated as follows:
$$-3\div -9/13$$
$$= -3\times 13/-9$$
We get,
$$= -13/-3$$
$$= \left \{-3\times (-1) \right \}/ \left \{-3\times (-1)\right \}$$
$$= 13/3$$
$$= 4\dfrac {1}{3}$$
Therefore, the required number is
$$4\dfrac {1}{3}$$.