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.closest() not working on jquery when applied to on change event

I have a table like this

<table style="width:100%">
      <tr>
        <th>Downpayment (%)</th>
        <th>Downpayment (₱)</th>
        <th>Balance</th>
        <th>Payment Period (Months)</th>
        <th>MA 1 - XX</th>
        <th>MA 1 - XX (VAT)</th>
      </tr>
      <tr>
        <td class="dp-perce" data-perce="0">0%</td>
        <td class="dp-peso"></td>
      </tr>
      <tr>
        <td class="dp-perce" data-perce="15">15%</td>
        <td class="dp-peso"></td>
      </tr>
      <tr>
        <td class="dp-perce" data-perce="30">30%</td>
        <td class="dp-peso"></td>
      </tr>
      <tr>
        <td class="dp-perce" data-perce="50">50%</td>
        <td class="dp-peso"></td>
      </tr>
      <tr>
        <td class="dp-perce" data-perce="95">95%</td>
        <td class="dp-peso"></td>
      </tr>
    </table>

whenever I use closest(), it is always returning null. what seems to be the problem? here is my jquery:

<script>
     $('#unit-type').on('change', function() {
       $('.dp-peso').each(function(){
           var percentage = $(this).closest('td').find('.dp-perce').data('perce');
           $(this).text(percentage);
       });
    });
   </script>

what this script is doing is to get the value of data-attribute of the closest dp-perce then display to class name dp-peso.

please let me know the bug. I've been stuck here for a long time/

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