Question

Equivalent ratio of 30:36=5:_

Answer 1

30:36 is equivalent to 5:6

Answer 2

30:36 (divide by 6) = 5:6 
56:36 (divide by 4) = 14:9 
15:18:9 (divide by 3) = 5:6:3 

When solving ratios divide by greatest common factor of the numbers(GCF). 

Example: 2:4:6 
GCF=2 
Divide by 2 
Answer=1:2:3 

I hope this was helpful to you!