81/100 = 81%
A score of 81% might show up on a test, a phone battery, or a weather forecast. It means the result is a little over four-fifths of the whole.
To picture 81/100 quickly, imagine a hundred-square grid with 81 squares shaded. You can also think of it as close to 80 out of 100, or about four-fifths.
One common point of confusion is treating 81% as the same as 81 percentage points. For example, a score rising from 10% to 81% goes up by 71 percentage points, not 81.
