Answer:
9
Step-by-step explanation:
9/27 divided by 9 = 1/3
27
with GCF's you can only go bigger and 27 is the biggest one out of the options and also fits divides into both numbers 9 and 27 with no remainder (example: 27 divided by 9 is 3 and 27 divided by 27 is 1)
