// Introducing Functions

// Define the function ProfitPercent which takes  
// two double parameters, Income and Expenses
// and returns a double

dbl ProfitPercent(double Income, double Expenses)
{
   return (Income - Expenses) / Expenses * 100;
}

// Call the ProfitPercent function 3 time 
// For Profit3, invoke the internal function 
// "Round" to round the result to 
// 2 decimal places.
// Note: "_ReturnValue" holds the value of the
// last operation made

double Profit1, Profit2, Profit3;

Profit1 = ProfitPercent(99,90);
Profit2 = ProfitPercent(100,75);
Profit3 = Round(ProfitPercent(100,75),2);