Do anybosy know that % of money do the looser of a boxing match get ?

some kid in my school thinks the looser of a boxing match get more money then the winner. and he said felix trinidad got more money for loosing to roy jones jr. and i told him only fighters like benard hopkins and delahoya get more if they loose cuz they promote their own fights. am i right? and do anybosy know how much money did felix trinidad got and how much roy jones got??