40/64 as a percentage is 62.50%. This is the exact value when you turn the fraction into a percent and round to two decimal places.
The fraction 40/64 can be reduced to 5/8, which is a common way to think about it in simpler terms. Seeing it as 5 parts out of 8 gives a quick sense of its size—just a little more than half.
In everyday situations, 62.50% might appear on a test score, a discount coupon, or a portion of a recipe. Knowing that 40/64 equals this percentage helps you compare numbers easily without getting stuck on the fraction.