Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
1946 Dahomey and Togo by-election
Table title:
Results
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Candidate </th><th colspan=1 rowspan=1 > Party </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Pierre Bertho </td><td class="highlighted"  colspan=1 rowspan=1 > Popular Republican Movement </td><td class="highlighted"  colspan=1 rowspan=1 > 644 </td><td colspan=1 rowspan=1 > 100 </td></tr>
<tr> <td colspan=2 rowspan=1 > Invalid/blank votes </td><td colspan=1 rowspan=1 > 174 </td><td colspan=1 rowspan=1 > – </td></tr>
<tr> <td colspan=2 rowspan=1 > Total </td><td class="highlighted"  colspan=1 rowspan=1 > 818 </td><td colspan=1 rowspan=1 > 100 </td></tr>
<tr> <td colspan=2 rowspan=1 > Registered voters/turnout </td><td colspan=1 rowspan=1 > 1,415 </td><td colspan=1 rowspan=1 > 57.8 </td></tr>
<tr> <td colspan=4 rowspan=1 > Source: National Assembly </td></tr>
</table>
Question:
What ratio of total votes did Pierre Bertho earn during the 1946 Dahomey and Togo by-election?
Answer:
Pierre Bertho of the Popular Republican Movement was the candidate elected with 644 of the 818 votes casted.