63/64 as a percentage is 98.44%. This value shows how close the fraction is to a whole number.
The fraction 63/64 is just one sixty‑fourth less than 1, so it’s often used when you need something that’s almost complete but not quite. In cooking, woodworking, or grading, you might see it represent a tiny shortfall.
Because the percentage is rounded to two decimal places, the exact value might be a little bit different, but 98.44% is the standard way to write it for most everyday purposes.