77/88 = 87.5%
A value like 77/88, or 87.5%, might show up as a test score, a phone battery level, or the share of people who chose a certain option in a poll. It describes something that is close to nine out of ten, but not quite.
To picture it quickly, imagine a bar split into eight equal parts: 87.5% fills seven of them. You can also think of it as a little less than a full bar, with about one-eighth left empty.
A common point of confusion is thinking 87.5% means 87.5 out of 100 items, even when the total is a different number. It describes a proportion, so the actual number of items depends on how many there are altogether.