Yes, the ratios are proportional
Explanation
the easy way to figure out this is by simplyfing the fractions
[tex]\begin{gathered} a)\frac{7}{9}\rightarrow\frac{7}{9} \\ b)\frac{49}{63}\rightarrow\frac{7\cdot7}{7\cdot9}=\frac{4}{9} \end{gathered}[/tex]as we can see the resultant fraction is the same, so the ratios are proportional.
I hope this helps you
