Question

Multiply:
(i) $\frac{7}{11}\mathrm{by}\frac{5}{4}$
(ii) $\frac{5}{7}\mathrm{by}\left(\frac{-3}{4}\right)$
(iii) $\frac{(-2)}{9}\mathrm{by}\frac{5}{11}$
(iv) $\frac{-3}{17}\mathrm{by}\frac{-5}{-4}$

Answer 1

$$\begin{gathered} \left(\mathrm{i}\right)\frac{7}{11}\times \frac{5}{4}=\frac{7\times 5}{11\times 4}=\frac{35}{44} \\ \left(\mathrm{ii}\right)\frac{5}{7}\times \frac{-3}{4}=\frac{5\times -3}{7\times 4}=\frac{-15}{28} \\ \left(\mathrm{iii}\right)\frac{-2}{9}\times \frac{5}{11}=\frac{-2\times 5}{9\times 11}=\frac{-10}{99} \end{gathered}$$

$\left(\mathrm{iv}\right)\frac{-3}{17}\times \frac{-5}{-4}=\frac{-3\times 5}{17\times -4}=\frac{-15}{68}$