45/80 as a percentage is 56.25%. This is the exact value when the fraction is expressed in percent form, rounded to two decimal places.
The fraction 45/80 can also be reduced to 9/16, which still represents the same portion of a whole. Whether you see it as 45 out of 80 parts or 9 out of 16, the size of the part stays the same.
In everyday situations, a result of 56.25% might show up on a test score, a discount, or a survey result. It tells you that a little more than half of the total is being considered.
