59/90 as a percentage is 65.56%. This value is the rounded result you get when you express the fraction as a part of one hundred.
The fraction 59/90 is a bit more than one half but less than three quarters. It can be useful when you need to compare parts of a whole, like scoring 59 points out of a possible 90 on a test.
In everyday situations, turning the fraction into a percentage makes it easier to understand. Saying you earned 65.56% on the test sounds clearer than the raw fraction for most people.
