Answer:
16) The ratios
are proportional.
17) The ratios
are not proportional.
Explanation:
we need to determine if the ratios form the proportions.
16)

If the ratios are proportional, their cross product will be equal. i.e.

So, finding cross product and checking:

Since the cross product is equal i.e. 81=81 so, the ratios are proportional.
The ratios
are proportional.
17)

If the ratios are proportional, their cross product will be equal. i.e.

So, finding cross product and checking:

Since the cross product is not equal i.e. 238≠225 so, the ratios are not proportional.
The ratios
are not proportional.