I get this question a lot. Students ask me, "When will I ever use this stuff?", meaning mathematics. Or, what is even more irritating, "What vocation can I go into where no math is involved?"
This site addresses the first question. When I answer the second question, I sometimes refer to 'deep frying chicken' or 'riding on the back of a garbage truck', but I'm not sure those vocations are entirely 'math free'. They probably need to know that the placement of the decimal point in their paycheck amount is important.