45/64 as a percentage is 70.31%. This rounded figure tells you how close the fraction is to a whole number when expressed in percent form.
The fraction 45/64 can be thought of as 45 parts out of a total of 64 equal parts. When you look at it on a number line, it sits a little more than two‑thirds of the way from zero to one.
In everyday situations, you might see a result like 70.31% on a test score, a discount, or a poll result. Knowing the percentage makes it easier to compare with other values that are already in percent form.