Answer:
The common ratio of the sequence. 0.1, 0.01, 0.001, ...... is 0.1 .
Explanation:
The geometric series in the form

Where a is the first term r is the common ratio .

As given the sequence in the question
0.1, 0.01, 0.001, .......
a = 0.1
ar = 0.01

r = 0.1
Therefore the common ratio of the sequence. 0.1, 0.01, 0.001, ...... is 0.1 .