21/96 as a percentage is 21.88%. This rounded figure tells you how much of a whole the fraction represents in a more familiar format.
The fraction 21/96 can be simplified to 7/32, which still reflects the same portion of a whole. Whether you write it as a fraction or a percentage, the value stays the same; the choice just depends on what is easier to understand for your audience.
In everyday life, percentages like 21.88% are useful for quick comparisons—such as seeing how a test score compares to a perfect score or how a discount changes the price of an item. Knowing the percentage makes it simple to grasp the size of the part relative to the whole.