64/99 = ≈64.65%
Rounded to 2 decimal places.
A value like 64/99, or about 64.65%, could describe how many people in a survey chose one option or how often a team succeeds. It means the result is a little under two-thirds.
A quick way to picture it is to imagine about 65 shaded squares in a grid of 100. That is close to two-thirds, but slightly less.
One common point of confusion is treating 64.65% as exact when it is a rounded value. The fraction 64/99 is exact, while the percentage is an approximation.