What is 54/68 as a percentage? 79.41%. This is the rounded value you get when you turn the fraction into a percent.
The fraction 54/68 can be reduced to 27/34, but the size of the part stays the same. Whether you write it as 54/68, 27/34, or 79.41%, it represents the same portion of a whole.
Knowing the percentage makes it easy to compare with other numbers. For example, if you scored 54 out of 68 points on a test, you earned about 79.41% of the possible points, which is a solid B‑grade.