Answer :
The original ratio is given to be:
[tex]4.5\colon2.25[/tex]The question asks to write the ratio in the form:
[tex]n\colon1[/tex]This means that we have to divide both sides of the ratio by the 2nd ratio (2.25). This is because we have the 2nd part of the ratio n:1 to be 1. This will give us the new ratio.
Therefore, the new ratio can be calculated to be:
[tex]\begin{gathered} \frac{4.5}{2.25}\colon\frac{2.25}{2.25} \\ 2\colon1 \end{gathered}[/tex]Therefore, the new ratio in the form of n : 1 is given to be:
[tex]\Rightarrow2\colon1[/tex]