3/15 = 20%
A fraction like 3/15, or 20%, can show up in everyday situations such as sales, surveys, or attendance. For example, if 3 out of 15 students bring lunch from home, then one-fifth of the group does so.
To picture 20% quickly, imagine a group divided into five equal parts and focus on one of those parts. It is also close to one out of every five items, so you can estimate it without needing exact measurements.
A common mistake is thinking 20% means 20 items instead of 20 out of every 100, or one out of five. The total amount matters, so 3 out of 15 and 20 out of 100 can represent the same proportion.
