Question

Are these ratios equivalent?9 cellos to 10 basses 18 cellos to 20 basses

Answer 1

ratios are equivalent if the cross product between the two is equal, we do

$\begin{gathered} \frac{9}{10}y\frac{18}{20} \\ 9\times20=18\times10 \\ 180=180 \end{gathered}$

therefore, ratios are equivalent

answer: yes, ratios are equivalent