Question

The value of the ratio of adults to children Is 2/5. The ratio of adults to chlldren is 10:5 5:2 2:5

Answer 1

The ratio between 'a' and 'b', when 'b' is not zero, is:

$\begin{gathered} \frac{a}{b} \\ or \\ a\colon b \end{gathered}$

and you read this "a is to b"

In this case, we have that the ratio of adults to children is:

$\begin{gathered} \frac{2}{5} \\ or \\ 2\colon5 \end{gathered}$