78.05% is what you get when you turn the fraction 64/82 into a percentage. This rounded value tells you how large 64 is compared to 82 in everyday terms.
The fraction 64/82 can also be simplified to 32/41, but the percentage stays the same. Seeing it as a percent makes it easier to compare with other numbers, like grades or discounts.
When you need a quick estimate, just remember that 64 out of 82 is a little under four‑fifths, and 78.05% reflects that proportion nicely.
