54/83 as a percentage is 65.06%. This is the rounded value you get when you change the fraction into a percent with two decimal places.
The fraction 54/83 means you have 54 parts out of a total of 83 equal parts. It’s a little more than half, but not close to three‑quarters. When you look at it as a percent, you can see it’s just a bit above 60 %.
Knowing the percent form helps when you compare numbers, like scores on a test or interest rates. So if you see 65.06%, you now know it comes from the fraction 54/83.