the pareto principle (aka the 80/20 rule): for many events, 80% of the results come from 20% of the causes. examples:
-you wear 20% of what’s in your closet 80% of the time. -80% of the women date 20% of the men. -80% of a company's profits come from 20% of its customers -80% of all frustrations in a relationship are caused by just 20% of the problems -80% of your stress can be linked to 20% of the people you surround yourself with -20% of the foods you eat account for 80% of the weight you gain -20% of your friends give you 80% of your enjoyment -80% of the world's pollution comes from 20% of the factories -80% of the awards/achievements go to 20% of athletes/artists/authors/actors -20% of all the artists on spotify are responsible for 80% of the sales -80% of your grades come from 20% of your efforts