Can you find me some of examples of psychology statistic and percentages?

I've got to do a project on why math is important to something im plaaning on doing. I picked psychology because i plan on being a psychologist. I found out some mathematical things in psych. are percentages and statistics and i just need some examples that would be something tht has to do with psychology. You kno, something like( and this is an example, not true i just made it up) 32% of kids who are exposed to alcoholics are bullied in skool. I tried looking online but im not finding much and i dont kno wat site to go on tht wld have a list of these. I f you kno a site or u kno any, plz tell me . Thx sooo much!