64/81 as a percentage is 79.01%. This number tells you how much of a whole 64 parts out of 81 represent when you look at it in terms of hundredths.
The fraction 64/81 is a proper fraction, meaning the numerator is smaller than the denominator. It can be reduced to a decimal that repeats, and that repeating decimal becomes the percentage we just saw. Seeing it as 79.01% makes it easier to compare with other percentages, like grades or interest rates.
In everyday situations, you might use this conversion when you need to estimate a score, a discount, or a probability. Knowing that 64 out of 81 is roughly 79 % helps you quickly decide if something is above or below a typical benchmark.
