Common differences in sequences-math?

Question

what is the common difference for this sequence?

1/4, 5/16, 3/8, ...

1. 1/16

2. 1/4

3. 1/2

Answer 1

it would be 1/16

if you make them all over 16, you get

4/16, 5/16, 6/16, and the next two would be 7/16 and 8/16

make it a good day