What is the common ratio of this sequence? 5,2,0.8,0.32

2 Answers
Dec 8, 2017

125:50:20:8

Explanation:

Remove all decimal places by multiplying each figure by 10^(highest decimal places)

500,200,80,32

Divide each figure in the sequence by a common factor every time until the figures in the sequence no longer share a common multiple.

250,100,40,16

125,50,20,8

Convert it to ratio form

125:50:20:8

Dec 8, 2017

0.4

Explanation:

Take pairs of successive terms and find the ratio by dividing:
2/5=0.4

0.8/2=0.4

0.32/0.8=0.4