Multiply Rational Numbers Practice Test

Two numbers have a product of $$-24$$. If one number is $$\frac{3}{5}$$ and both numbers can be positive or negative, which of the following could NOT be the other number?

A baker uses the expression $$(-\frac{3}{4}) \times(-\frac{8}{9}) \times(\text{flour amount})$$ to adjust a recipe. If this expression must equal $$\frac{1}{2}$$ cup of flour, what was the original flour amount?