Algebra sequences

Question

What is the common ratio of the following sequence?

80, 20, 5, ...

Answer 1

This problem is under Geometric sequence.

to find the ration, you are going to divide the second term by the first term, or the third term by second term

20÷80=1/4

5÷20=1/4

therefore, the ratio of the sequence 80,20,5... is 1/4.

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Answer 2

4 (4:1)- that is, 80/4=20 and 20/4=5