90/96 as a percentage is 93.75%. This tells you that the fraction is just a little short of a whole, and the decimal form rounds nicely to two places.
The fraction 90/96 can be reduced to 15/16, which is a common way to see how close it is to 1. In everyday terms, you are getting 93.75 out of every 100 parts, which is a strong performance.
When you think about it in real life, imagine a test where you answer 90 out of 96 questions correctly. Your score would be 93.75%, showing you did very well.
Using the percentage makes it easier to compare with other numbers that are already in percent form, so you can quickly see how good the result is without dealing with fractions.