4/16 as a percentage is 25.00%. This simple fraction reduces to 1/4, which is a quarter of a whole, and that quarter shows up as a quarter of 100, or 25 percent.
The fraction 4/16 can be cut down by dividing both numbers by 4, giving the easier form 1/4. Seeing it as a quarter helps you understand why it represents a quarter of any total amount.
When you need to compare parts of a whole in everyday situations—like sales, recipes, or grades—thinking of 4/16 as 25.00% makes the math quick and clear.