The fraction 50/66 is equal to 75.76% when converted to a percentage. This means that if you had 66 items and took 50 of them, you'd have about three-quarters of the total. It's a bit more than 75%, but not quite 76%.
In everyday life, you might see this fraction pop up in various situations. For example, if 50 out of 66 students passed a test, you could say the pass rate was 75.76%. Or if a basketball player made 50 out of 66 free throws in a season, their free throw percentage would be 75.76%. It's a useful number to know for quick mental math when dealing with parts of a whole.