13/52 = 25%
A fraction like 13/52, or 25%, can show up when one-fourth of a group has a certain feature. For example, 13 out of 52 students might ride the bus, or 13 of 52 items in a store might be on sale.
You can picture 25% as one out of every four equal parts. A quick estimate is to imagine dividing a group into four nearly equal sections and checking whether one section contains about 13 items out of 52.
A common mistake is thinking 25% means 25 items, no matter how large the group is. The percentage describes the portion of the whole, so the actual number of items changes when the total changes.
