When you go to stores and it advertises 25% off or something like that is a big one. tipping 15% or 20% is another application. a third would maybe be the interest you earn on a bank account??
Tax rate, tipping percent (how much you tip the waiter/waitress based on the price of the meal), and elections or other voting events most of the time go by a percent of people who voted. Hope this helped.
