CKEditor Table Width and Column Width Units

I am currently testing CKEditor.

Especially the features of the table resize and table plugin.

What I found out so far is that it seems to work sometimes with pt and sometimes with px.

Is there a way I can change the behaviour to work always with percentage or some other kind of relative ratio instead of px or pt for column width?

<table border="1" cellpadding="1" cellspacing="1" style="width:1340px">
	<thead>
		<tr>
			<th scope="col" style="width:386px">1</th>
			<th scope="col" style="width:953px">
			<p>2</p>
			</th>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td style="width:386px">3</td>
			<td style="width:953px">4</td>
		</tr>
	</tbody>
</table>