Answer:
It is hard to tell someone their breath stinks sometimes their feelings will get hurt or theyact like your being rude or maybe even you feel like your being rude but if you can ignore it, that is probably the way to go. If it is so bad you can not ignore it pass them a mint or act like something stinks and maybe even ask them if they smell it and then check your breath and then maybe that will get them to check their breath also.