chromium/third_party/blink/web_tests/tables/mozilla/core/col_widths_auto_fixPer.html

<table border=1>
 <tr>
  <td bgcolor=red width=200>fooooooooo
  <td bgcolor=green width=200>fooooooooo
  <td bgcolor=orange width=50%>foo foo foo foo
  <td bgcolor=blue width=50%>foo foo foo foo</tr> 
</table>
<BR>
<table border=1>
 <tr>
  <td bgcolor=red width=200>foo foo foo foo
  <td bgcolor=orange width=20%>foo foo foo foo
  <td bgcolor=blue width=20%>foo foo foo foo 
  <td align=right bgcolor=green width=100%>foo foo foo foo
  <td bgcolor=red width=200>foo foo foo foo</tr>
</table>
<BR>
auto table - % width cell increases table width based on % cell which makes it largest
<table cellspacing=10 border>
 <tr>
  <td width=1%>1%</td>
  <td width=10%>10%</td>
  <td width=20>20px</td></tr>
</table>
<BR>