Round #557

What is 15 percent of 80?

To find 15 percent of 80, you can multiply 80 by 0.15. 80 * 0.15 = 12 So, 15 percent of 80 is 12.

To find 15 percent of 80, you can multiply 80 by 0.15. 80 * 0.15 = 12 So, 15 percent of 80 is 12. Here is a simple C# function that calculates a percentage of a given number: ```csharp public class PercentageCalculator { public static double CalculatePercentage(double number, double percentage) { if (number < 0 || percentage < 0) { throw new ArgumentException("Number and percentage must be non-negative."); } return number * (percentage / 100); } public static void Main(string[] args) { double number = 80; double percentage = 15; double result = CalculatePercentage(number, percentage); Console.WriteLine($"{percentage}% of {number} is {result}"); } } ``` In this code: - The `CalculatePercentage` function takes a number and a percentage as input, checks if they are non-negative, and returns the calculated percentage. - The `Main` function demonstrates how to use the `CalculatePercentage` function with the example of 15 percent of 80.