84/90 expressed as a percentage is 93.33%. This tells you that the fraction is just a little under a whole, or 100 %. It’s a quick way to see how close 84 is to 90 in everyday terms.
If you simplify the fraction, 84/90 reduces to 14/15. That shows the same relationship in a smaller form, but the percentage stays the same. Seeing it as a percent makes it easier to compare with other numbers, like grades or test scores.
In real life you might use this value when you score 84 out of 90 points on a quiz, or when you complete 84 of 90 tasks. Knowing that it equals 93.33% helps you understand the performance level at a glance.