Question

The product of two rational numbers is −9. If one of the numbers is −12, find the other.

Answer 1

$\begin{array}{l}\text{Let the other number be x.}\\ x\times (-12)=-9\\ \begin{array}{l}=>x=-\text{9}÷(-\text{12})\\ =-\text{9}\times \left(\frac{1}{-12}\right)\\ =-\text{9}\times \left(\frac{-1}{12}\right)\\ =\frac{{\sout{9}}^3}{\sout{1}{\sout{2}}_4}\end{array}\\ \mathrm{Hence},\mathrm{the}\mathrm{other}\mathrm{number}\mathrm{is}\frac{3}{4}.\end{array}$