Answer:
0.5
Step-by-step explanation:
We are given the following sequence and we are to determine its common ratio:
20, 10, 5, 2 1/2
In a sequence, the common ratio is the ratio of a term to its previous term.
So here, we will divide each term by its previous term to find the common ratio.
2 1/2 = 2.5 ---> 2.5/5 = 0.5
5/10 = 0.5
10/20 = 0.5
Therefore, the common ratio of this sequence is 0.5.
