Rationalize the denominators
25/3√225z
25
--------
3 sqrt(225z)
well
225 = 25 * 9
so
25
---------------- * sqrt z/sqrt z
3 * 5 * 3 sqrt z
5 sqrt z
------------------
9 z
25/3√225z
--------
3 sqrt(225z)
well
225 = 25 * 9
so
25
---------------- * sqrt z/sqrt z
3 * 5 * 3 sqrt z
5 sqrt z
------------------
9 z