Can someone do this step by step? (please dont reupload other answers)

5. Find the relative difference between the classical KE and the relativistic KE (note that KErelativisitic is the true KE). That is, find (KErelativisticKEclassical)/KErelativistic and express it in percent. Do this for for an electron moving at a) v=0.1c b) v=0.5c c) v=0.9c d) v=0.99c e) repeat all for a neutron. Look for formula shortcuts to speed your work