Question

Check whether the following quantities form a proportion or not:
$0.8,3,2\cdot 4$ and 9

Answer 1

$0.8,3,2.4,9$

$\frac{0.8}{3}=\frac{8}{30}=\frac{4}{15}=\frac{24}{90}=\frac{2.4}{9}$

Hence these values are in proportion.