Question

What is the common ratio of the sequence 80, 20, 5, 5/4 . . . .? What are the next three terms of the sequence?

Answer 1

you are dividing by 4 in each sequence... So...
(5/4) / 4 = 5/16
(5/16) /4 = 5/64
(5/64) /4 = 5/256

Answer 2

Luis, you had the first two in the sequence correct, however the last one is 5/64 / 4 which is essentially 5/(4*64)
= 5/256