Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<body>

<table border="1" width="100%">
  <tr>
    <th>Month</th>
    <th>Savings</th>
  </tr>
  <tr>
    <td width="70%">January</td>
    <td width="30%">$100</td>
  </tr>
  <tr>
    <td>February</td>
    <td>$80</td>
  </tr>
</table>

<p>The width attribute is deprecated in HTML 4, and is not supported in HTML5. Use CSS instead.</p>

</body>
</html>

Result:

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