18/90 = 20%
A value like 18/90, or 20%, can show up in everyday life when 18 out of 90 people choose a certain option, 20 out of 100 products have a defect, or one-fifth of a group participates in an event. It is common in surveys, classroom statistics, sales reports, and discounts.
To picture 20% quickly, think of one section out of five equal sections. You can also imagine 20 items out of a group of 100, which makes it a fairly small but noticeable portion.
A common mistake is thinking 20% means 20 percentage points in every situation or confusing it with 20 times as much. It simply describes a part of a whole, and the whole must be clear before the value can be understood.
