How to calculate percentage

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assuming i have 7 textfields as listed below
1. Subject1
2. subject2
3. subject3
4. subject4
5. subject5
6. subject6
7. Subject7
8.Output Score
9.Button
how do i calculate the percentage if the student don't offer all the 7 subjects ?

HERE IS THE FORM CODE

HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>

<body>
<form id="form1" name="form1" method="post" action="">
  <table width="900">
    <tr>
      <td width="79">Subject1:</td>
      <td width="809"><input type="text" name="textfield" placeholder="Enter Score"/></td>
    </tr>
    <tr>
      <td>Subject2:</td>
      <td><input type="text" name="textfield2" placeholder="Enter Score"/></td>
    </tr>
    <tr>
      <td>Subject3:</td>
      <td><input type="text" name="textfield3" placeholder="Enter Score"/></td>
    </tr>
    <tr>
      <td>Subject4:</td>
      <td><input type="text" name="textfield4" placeholder="Enter Score"/></td>
    </tr>
    <tr>
      <td>Subject5:</td>
      <td><input type="text" name="textfield5" placeholder="Enter Score"/></td>
    </tr>
    <tr>
      <td>Subject6:</td>
      <td><input type="text" name="textfield6" placeholder="Enter Score"/></td>
    </tr>
    <tr>
      <td>Subject7:</td>
      <td><input type="text" name="textfield7" placeholder="Enter Score"/></td>
    </tr>
    <tr>
      <td>Output:</td>
      <td><input type="text" name="textfield8" placeholder="Display percentage"/></td>
    </tr>
    <tr>
      <td> </td>
      <td><input type="submit" name="Submit" value="Calculate! " /></td>
    </tr>
  </table>
</form>
</body>
</html>

Posted 21-Dec-14 4:46am

jeffabbey25

Updated 21-Dec-14 5:17am

Marcin Kozub

v2

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Comments

Marcin Kozub 21-Dec-14 11:18am

Percentage of what? Your question is not clear.

jeffabbey25 21-Dec-14 16:09pm

for grading. maximum score per subject is 100 i.e if a student gets 50 in 7 subjects, it should be (350/700)*100. that is to say (total score/number of subject)*100. i want it to calculate base on the subject offered.

Marcin Kozub 22-Dec-14 3:46am

You know how to calculate percentage, so what is your real problem?

jeffabbey25 22-Dec-14 6:14am

i dont think u get the question. am working on a grading system that contains 7 textfield. i want it to calculate itself base on the number of subject offered i.e it might be one subject,2,3,4,5. i want it to be conditional where as the number of subject offered should be used to get the appropriate percentage output.

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Abhinav S · Answer 1 · 2014-12-21T05:32:00

Solution 1

Take a count of the number of subjects he is taking.
Then take the sum of his score and divide it by this count.

Posted 21-Dec-14 5:32am

Abhinav S

Comments

jeffabbey25 21-Dec-14 15:42pm

i need a script to automatically take the sum of the textfield filled and do the mathematics