63/75 = 84%
A value like 84% might show up as a test score, a phone battery level, or the share of people who chose a certain option in a survey. In everyday terms, it means something is true or complete most of the time, but not quite all the way.
You can picture 84% as a little more than four-fifths of a whole. Imagine a bar filled almost to the top, with a small gap left at the end.
One common mix-up is treating 84% as if it means 84 out of 75, rather than a portion of a whole. Percentages are always understood in relation to 100%, so the whole being measured matters.