1644/1644 = 100%
The fraction 1644/1644 represents a complete amount, such as a full tank of gas, a finished assignment, or every student in a group being counted. In everyday life, this kind of value means nothing is missing, so it equals 100%.
You can picture it as one whole circle fully shaded or a progress bar filled from beginning to end. A quick estimate is that the top and bottom numbers are identical, which signals that the fraction is exactly one whole.
A common mistake is thinking the large numbers make the value greater than 100%. The numbers may be large, but because they are equal, the fraction still represents one complete whole, not more than one.