Démonstration des propriétés de pourcentage

Code source :
<html>
  <head>
    <style>
      table {
        width: 100%; 
        height: 600px; 
        border: 6px double #000000; 
        margin: 10%;
      }
      td {
        width: 33%; 
        height: 20%; 
        border: 3px solid #00FF00; 
        background-color: #339933;
      }
    </style>
  </head>
  <body>
    <table border="0" summary="">
      <tr>
        <td> </td>
        <td> </td>
        <td> </td>
      </tr>
      <tr>
        <td> </td>
        <td> </td>
        <td> </td>
      </tr>
      <tr>
        <td> </td>
        <td> </td>
        <td> </td>
      </tr>
      <tr>
        <td> </td>
        <td> </td>
        <td> </td>
      </tr>
      <tr>
        <td> </td>
        <td> </td>
        <td> </td>
      </tr>
    </table>
  </body>
</html>