6/16 as a percentage is 37.50%. This is the exact value when the fraction is expressed with two decimal places.
The fraction 6/16 can be simplified to 3/8, which is a common way to see the same part of a whole. Whether you write it as 6/16 or 3/8, it still represents the same portion of a set.
In everyday situations, you might use this percentage to describe a share of a pizza, a portion of a budget, or a grade on a test. Remember that 37.50% means just over one‑third of the total.