ected-width=288>
  <tr>
    <td colspan=2 style="height:20px" data-expected-width=48></td>
    <td colspan=8 style="height:20px" data-expected-width=216></td>
  </tr>
</table>

<h2>Percentage only</h2>

<p 17 class="testdesc">Assignable: 100px;columns add to 100%, auto width
Column percent adds to a 100, but because box-sizing is content box,
Column content size adds up to table width.
Column border size adds up to table width + padding (36px).
Columns get scaled down.
Scaling down is not defined by standar