Determine whether the ratios are equivalent. 18 balloons for every 6 centerpieces
27 balloons for every 9 centerpieces

With both ratio= 3

The ratio are equivalent

Step-by-step explanation:

Ratio= number of balloons/ number of centerpieces

For

18 balloons for every 6 centerpieces

Ratio= 18/6

Ratio= 3

For

27 balloons for every 9 centerpieces

Ratio= 27/9

Ratio= 3

Value of each ratio= 3 and 3

3=3

So they are eqtand equivalent