Answer: 1:6
Explanation:
This is really simple
First, you find the total number of shapes (in this case, it would be 20 + 4 = 24)
Since the ratio is of circles to total shapes, the non-simplified version of the ratio would be 4:24
To get the simplified version you would have to keep dividing both numbers by 2
4:24 = 2:12
2:12 = 1:6
Therefore, your answer is 1:6