Question

Replace $\boxed{}$ by the correct number in each of the following:
(i) $\frac{2}{7}=\frac{8}{\boxed{}}$
(ii) $\frac{3}{5}=\frac{\boxed{}}{35}$
(iii) $\frac{5}{8}=\frac{20}{\boxed{}}$
(iv) $\frac{45}{60}=\frac{9}{\boxed{}}$
(v) $\frac{40}{56}=\frac{\boxed{}}{7}$
(vi) $\frac{42}{54}=\frac{7}{\boxed{}}$

Answer 1

(i) 28 $\left(\frac{2}{7}=\frac{2\times 4}{7\times 4}=\frac{8}{28}\right)$
(ii) 21 $\left(\frac{3}{5}=\frac{3\times 7}{5\times 7}=\frac{21}{35}\right)$
(iii) 32 $\left(\frac{5}{8}=\frac{5\times 4}{8\times 4}=\frac{20}{32}\right)$
(iv) 12 $\left(\frac{45}{60}=\frac{45÷5}{60÷5}=\frac{9}{12}\right)$
(v) 5 $\left(\frac{40}{56}=\frac{40÷8}{56÷8}=\frac{5}{7}\right)$
(vi) 9 $\left(\frac{42}{54}=\frac{42÷6}{54÷6}=\frac{7}{9}\right)$