75/99 as a percentage is 75.76%. This value tells you how much of a whole 75 parts out of 99 represent when you look at it on a scale of 100.
The fraction 75/99 can also be thought of as a little less than three quarters, because three quarters equals 75/100 or 75%. The extra 0.76% comes from the fact that the denominator is a bit smaller than 100, so each part is slightly larger.
When you see 75.76% on a report or a chart, you know it’s the same as saying 75 out of 99. It’s a handy way to compare this fraction with other percentages, especially when you’re dealing with data that uses a 100‑point scale.