What is the hightest number that 9 and 27 both be divided into?

The highest number that both 9 and 27 can be multiplied into is 9. 9 can go into 9 one time, and 9 can go into 27 three times. 
9•1=9
9•3=27
(9, 18, 27 )=times
I hope I helped.

Every number in the 27 times table can also be divisible by 9 because 27 is a multiple of 9.
So the highest number that can be divided by both 27 and 9 is...
27 x infinity...!
Hope this helps :)