Question

Are 7:3 and 28:12 proportional?

Answer 1

To find out, you can write the ratios as a fraction and simplify, like this

`\begin{gathered} 7\colon3\text{ }\Leftrightarrow(7)/(3) \\ 28\colon12\Leftrightarrow(28)/(12) \\ \text{Now simplifying the second ratio} \\ (28)/(12)=(4\cdot7)/(4\cdot3)=(7)/(3) \\ \end{gathered}`