Hi!
The easiest way to do this is to divide both numbers by 2, since they are even numbers, like this:
32/2/128/2 = 16/64 again divide by 2
16/2/64/2 = 8/32 we can now see that we can divide by 8
8/8/32/8 = 1/4 is simplified as can possibly be.
Hope this helps!