75/99 as a percentage is 75.76%. This rounded value tells you how much of a whole the fraction represents when you look at it on a scale of 100.
The fraction 75/99 can be reduced a little by dividing both numbers by 3, giving 25/33. Even though it’s not a simple whole number, it’s close to three‑quarters of a whole, which is why the percentage lands just under 76%.
When you need to compare this fraction to other numbers, using the percentage makes it easier. You can quickly see that 75/99 is a little less than three‑quarters, which is useful in everyday calculations or school work.