Question

$\text{The product of two rational numbers is -2.}\text{If one of them is}\frac{4}{7},\text{find the other.}$

Answer 1

$\because \text{The product of two numbers is -2.}\text{And, one of them is}\frac{4}{7}\therefore \text{The other number =-2}÷\frac{4}{7}=-2\times \frac{7}{4}=\frac{-1\times 7}{1\times 2}=\frac{-7}{2}$