Just for you louie:
http://web2.uvcs.uvic.ca/elc/studyzone/200/grammar/prepo.htm
Just for you louie:http://web2.uvcs.uvic.ca/elc/studyzone/200/grammar/prepo.htm
You didn't know the difference between the "of" and "on" relation to figuring percentages so you had to look them up?