Rationalize the denominator of 4/5 root 5

Question

 

 Rationalize the denominator of 4/5 root 5

Answer 1

If √n is in the denominator, then to rationalize the denominator you would multiply the fraction's numerator and denominator BOTH by √n, for any integer n.  (In effect, the original fraction has been multiplied by 1, i.e. a square root divided by itself.)