4/20 = 20%
A value like 4/20, or 20%, can show up in everyday situations such as a sale, a survey, or a test score. For example, if 4 out of 20 students choose pizza as their favorite lunch, that group represents 20% of the class.
You can picture 4/20 as 4 shaded pieces out of a group of 20 equal pieces. A quick estimate is to think of it as about one-fifth, since one-fifth of a group is a fairly small but noticeable portion.
A common mistake is thinking 4/20 is the same as 4%, because the numerator is 4. The denominator matters too: the 4 represents the selected part, while 20 represents the whole group.
