Question

Express -5/-7 as a rational number with :
(1) Positive denominator
(2) numerator (-30)
(3) denominator 56

Answer 1

$$\begin{gathered} \left(1\right). \\ \frac{-5}{-7}=\frac{-5\times -1}{-7\times -1}=\frac{5}{7} \\ \left(2\right). \\ \frac{-5}{-7}=\frac{-5\times 6}{-7\times 6}=\frac{-30}{-42} \\ \left(3\right). \\ \frac{-5}{-7}=\frac{-5\times -8}{-7\times -8}=\frac{40}{56} \end{gathered}$$