Question

Multiply:
(i) $\frac{7}{11}\mathrm{by}\frac{5}{4}$
(ii) $\frac{5}{7}\mathrm{by}\frac{-3}{4}$
(iii) $\frac{-2}{9}\mathrm{by}\frac{5}{11}$
(iv) $\frac{-3}{17}\mathrm{by}\frac{-5}{-4}$
(v) $\frac{9}{-7}\mathrm{by}\frac{36}{-11}$
(vi) $\frac{-11}{13}\mathrm{by}\frac{-21}{7}$
(vii) $-\frac{3}{5}\mathrm{by}-\frac{4}{7}$
(viii) $-\frac{15}{11}\mathrm{by}7$

Answer 1

$$\begin{gathered} \left(\mathrm{i}\right) \\ \frac{7}{11}\times \frac{5}{4}=\frac{7\times 5}{11\times 4}=\frac{35}{44} \\ \left(\mathrm{ii}\right) \\ \frac{5}{7}\times \frac{-3}{4}=\frac{5\times (-3)}{7\times 4}=\frac{-15}{28} \\ \left(\mathrm{iii}\right) \\ \frac{-2}{9}\times \frac{5}{11}=\frac{(-2)\times 5}{9\times 11}=\frac{-10}{99} \\ \left(\mathrm{iv}\right) \\ \frac{-3}{17}\times \frac{-5}{-4}=\frac{(-3)\times (-5)}{17\times (-4)}=\frac{15}{-68} \\ \left(\mathrm{v}\right) \\ \frac{9}{-7}\times \frac{36}{-11}=\frac{9\times 36}{(-7)\times (-11)}=\frac{324}{77} \\ \left(\mathrm{vi}\right) \\ \frac{-11}{13}\times \frac{-21}{7}=\frac{(-11)\times (-21)}{13\times 7}=\frac{231}{91}=\frac{33}{13} \\ \left(\mathrm{vii}\right) \\ \frac{-3}{5}\times \frac{-4}{7}=\frac{(-3)\times (-4)}{5\times 7}=\frac{12}{35} \\ \left(\mathrm{viii}\right) \\ \frac{-15}{11}\times 7=\frac{-15}{11}\times \frac{7}{1}=\frac{(-15)\times 7}{11\times 1}=\frac{-105}{11} \end{gathered}$$