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Editorial Team
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Editorial Team
Asked: May 13, 20262026-05-13T16:48:43+00:00 2026-05-13T16:48:43+00:00

I am trying to have a user imput data into several fields, then I

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I am trying to have a user imput data into several fields, then I want to be able to add that value and take a percentage of it. I realize that I could just add the variables, however I would like the user to be able to see the total and the percentage. If you would like to look at the site just for reference,
http://clubs.psu.edu/bk/sga/eform/budget.php
thanks!

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  1. Editorial Team
    Editorial Team
    2026-05-13T16:48:43+00:00Added an answer on May 13, 2026 at 4:48 pm

    im not sure what do you mean, but if you just want user to fill the form and then do some math on the results, you can do simply like that:

    $total = $_POST['field1'] + $_POST['field2'] + ... etc.
    

    then:

    $percentage = /* here some math for computing percentage */;
    

    and just display both in your template.


    UPDATE

    ok, so try something like that (with newest jQuery, just modify it to your needs):

    <html>
        <head>
            <script src="http://code.jquery.com/jquery-latest.js"></script>
        </head>
    <body>
        1st number: <input type="text" id="f1" value="0"/><br/>
        2nd number: <input type="text" id="f2" value="0"/><br/>
        <p></p>
        <script>
            $("input").keyup(function () {
                var add = parseInt($("#f1").val())+parseInt($("#f2").val());
                var per = parseInt($("#f1").val())/parseInt($("#f2").val())*100;
                $("p").html("add: "+add+"<br/>number1 is "+per+"% of number2");
            }).keyup();
        </script>
    </body>
    </html>
    

    that is what u expect?

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