54/62 as a percentage is 87.10%. This is the rounded value you would see on a report card, a budget sheet, or any simple calculation.
The fraction 54/62 can be reduced to 27/31, which still represents the same proportion of a whole. Whether you keep it as 54/62 or simplify it, the percentage stays the same because it reflects the same part of 100.
Knowing the percentage helps you compare this value to other numbers easily. For example, if you scored 54 out of 62 points on a test, you earned about 87% of the total possible points. This quick view makes it clear how well you performed.