What's the pattern of 40, 10, 5/2, 5/8

The sequence is starting at 40, then 10, then 5/2 ... so on.

It has a common ratio of 1/4.

So the pattern is multiplying each number by 1/4

40 x1/4 = 10

10 x 1/4 = 5/2

5/2 x 1/4 = 5/8

next should be 5/8 x 1/4 = 5/32