When you turn the fraction 83/100 into a percent, you get 83.00%. This shows how much of a whole the fraction represents in everyday terms.
The fraction 83/100 means you have 83 parts out of 100 equal parts. Thinking of it as a percentage makes it easy to compare with other numbers that are also expressed in percent.
In everyday use, saying something is 83.00% complete or 83.00% of a goal is clear and straightforward. It’s a simple way to communicate the size of the part relative to the whole.