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<html>
  <body>
    <script type="text/javascript">;
    //Program name: Hands-On Activity 4-1 (javascript)
    //Purpose: Ca,cluating Percentages increases in sales from 2010 to 2011
    //Author: Alex Pannunzio
    //Date last modified: 08-Feb-2016


    // Declaring variables for sales in 2010, 2011 and the % increase from 2010 to 2011
    var sales2010;
    var sales2011;
    var percentIncrease;
    var percentdifrence
    var BR = "<br />"; // html line break
    // Welcome the User
    document.write("Welcome to the % increase Calclueator" + BR);

    //Asking the user to imput the % for both years
    sales2010 = prompt("Please enter the percent of sales for 2010: ");
    sales2011 = prompt("Thanks, now enter the percent of sales for 2011:");

    //calcuate percent increase
    percentdifrence = sales2011 - sales2010;
    percentIncrease = (percentdifrence / sales2010) * 100;

    //Displaying the percent increase
    document.write("The sales price increase is " + percentIncrease + "% growth this year" + BR);

    //close program
    document.write("Thanks for using my program");

    </script>
  </body>
</html>