9/12 as a percentage is 75.00%. This is the rounded result you get when you turn the fraction into a percent with two decimal places.
The fraction 9/12 can be simplified to 3/4, which is an easy way to see that it represents three parts out of four equal parts.
In everyday life, 75.00% shows up a lot—think of a quiz where you get three out of four questions right, or a sale where three‑quarters of the price is kept.
Because the number is already rounded to two decimal places, you can use 75.00% directly in reports, charts, or simple calculations without further adjustment.