55/75 expressed as a percentage is 73.33%. This rounded figure shows how much of a whole the fraction represents when we look at it in terms of percent.
If you simplify the fraction first, 55/75 reduces to 11/15, which is easier to work with in many calculations. The value stays the same; only the numbers look a bit cleaner.
In everyday situations, you might see this percentage used to describe test scores, discounts, or any scenario where a part of a whole needs to be shown in percent form. Remember that the figure is rounded to two decimal places for convenience.