64/645 = ≈9.92%
Rounded to 2 decimal places.
A fraction like 64/645 could represent 64 defective items in a shipment of 645, 64 students in a school choosing one activity, or 64 customers responding to a survey. In each case, it describes a relatively small share of the whole: 9.92%.
To picture it quickly, imagine a group of 100 people and think of about 10 of them being included. Since 64/645 is just under one-tenth, you can estimate it as roughly 10% without needing an exact figure.
A common mistake is to read 64/645 as 64.5% or to focus only on the numerator, 64. The denominator matters just as much because it tells you the size of the entire group, and 64 is a small part of 645.