Untitled

<html>
<head>
<style>
table  td {
    border: 1px solid;
}
table {margin-left: auto;
margin-right: auto;
    width: 80%;
}


</style>
</head>
<body>

<table>
  <tr>
    <td colspan="3">Header</td>

  </tr>
  <tr>
    <td width="15%">Left</td>
    <td>Center</td>
    <td width="25%">Right</td>
</p>
  </tr>
  <tr>
    <td colspan="3">Footer</td>

  </tr>
</table>

</body>
</html>