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

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Answer 1 · 2017-12-08T21:27:51

#125:50:20:8#

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#

Answer 2 · 2017-12-08T21:30:58

0.4

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#