table 随td固宽

//给table,td定最小宽度

table.sheetbody{table-layout: fixed;min-width: %;}
td,th{
    min-width: 100px;
}

 <table border="" cellspacing="" cellpadding="" class="sheetbody">
  <colgroup>
      <col width="" span="" style="background:#3769c3;">
    <col width="" style="background:#628ad2;">
    <col width="" span="">
  </colgroup>
  <tr>
    <th colspan="" rowspan="" scope="col" class="date">Date ending on</th>
    <th colspan="" scope="col">PRC</th>
    <th rowspan="" scope="col">&nbsp;</th>
    <th colspan="" scope="col">OVERSEAS</th>
  </tr>
  <tr>
    <!--prc-->
    <th scope="col"><div class="elli">wk end<span>//</span></div></th>
    <th scope="col"><div class="elli">wk end<span>//</span></div></th>

    <!--overseas-->
    <th scope="col"><div class="elli">wk end<span>//</span></div></th>
    <th scope="col"><div class="elli">wk end<span>//</span></div></th>
  </tr>
 <tr>
    <td><p>Committed - Outflow</p></td>
    <td></td>
    <td></td>
    <td>&nbsp;</td>

    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
</table>