58/84 is about 69.05% when you turn the fraction into a percent.
The fraction 58/84 can be reduced to 29/42, which shows the same size relationship in a simpler form. Whether you use 58/84 or 29/42, they both represent the same part of a whole.
Knowing that 58/84 equals roughly 69.05% helps when you compare it to other percentages, like test scores or discounts. It tells you that the fraction is a little more than two‑thirds of the total.