Question

Multiply:
(i) $\frac{-5}{17}\mathrm{by}\frac{51}{-60}$
(ii) $\frac{-6}{11}\mathrm{by}\frac{-55}{36}$
(iii) $\frac{-8}{25}\mathrm{by}\frac{-5}{16}$
(iv) $\frac{6}{7}\mathrm{by}\frac{-49}{36}$

Answer 1

(i) $\frac{-5}{17}\times \frac{51}{-60}=\frac{-5}{17}\times \frac{17\times 3}{-5\times 3\times 4}=\frac{1}{4}$

(ii) $\frac{-6}{11}\times \frac{-55}{36}=\frac{-6}{11}\times \frac{-5\times 11}{6\times 6}=\frac{5}{6}$

$\left(\mathrm{iii}\right)\frac{-8}{25}\times \frac{-5}{16}=\frac{-8}{5\times 5}\times \frac{-5}{8\times 2}=\frac{1}{10}$

(iv) $\frac{6}{7}\times \frac{-49}{36}=\frac{6}{7}\times \frac{-7\times 7}{6\times 6}=\frac{-7}{6}$