Math, unfortunately, has never been my game. How often does a likelihood or probability become significantly less than 0. Isn't 0 the floor? Or is 0 the 50/50 v

Math, unfortunately, has never been my game. How often does a likelihood or probability become significantly less than 0. Isn't 0 the floor? Or is 0 the 50/50 value? I agree on the wasting of money for the wallpaper pattern that is called a degree.