Question

Is $\frac{8}{9}$ the multiplicative inverse of $-1\frac{1}{8}$? Why or why not?

Answer 1

If it is a multiplicative inverse, then the product $=1$

$\frac{8}{9}\times \left(\begin{array}{c}-1\frac{1}{8}\end{array}\right)=\frac{8}{9}\times \frac{-9}{8}=-1$

Product $=-1$

$\therefore$ It is not a multiplicative inverse.