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:
Hawaii Constitutional Amendment 2
Table title:
Results of vote
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Choice </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th></tr>
<tr> <td colspan=1 rowspan=1 > Referendum passed Yes </td><td colspan=1 rowspan=1 > 285,384 </td><td class="highlighted"  colspan=1 rowspan=1 > 69.2 </td></tr>
<tr> <td colspan=1 rowspan=1 > No </td><td colspan=1 rowspan=1 > 117,827 </td><td class="highlighted"  colspan=1 rowspan=1 > 28.6 </td></tr>
<tr> <td colspan=1 rowspan=1 > Valid votes </td><td colspan=1 rowspan=1 > 403,211 </td><td colspan=1 rowspan=1 > 97.8 </td></tr>
<tr> <td colspan=1 rowspan=1 > Invalid or blank votes </td><td colspan=1 rowspan=1 > 9,309 </td><td colspan=1 rowspan=1 > 2.2 </td></tr>
<tr> <td colspan=1 rowspan=1 > Total votes </td><td colspan=1 rowspan=1 > 412,520 </td><td colspan=1 rowspan=1 > 100.00 </td></tr>
<tr> <td colspan=1 rowspan=1 > Registered voters and turnout </td><td colspan=1 rowspan=1 > 601,404 </td><td colspan=1 rowspan=1 > 68.6 </td></tr>
<tr> <td colspan=3 rowspan=1 > Source: Hawaii Office of Elections (November 4, 1998). "1998 General Election Statewide Summary Report". Retrieved 2013-11-13. </td></tr>
</table>
Question:
What was the outcome of the Hawaii Constitutional Amendment vote?
Answer:
Hawaii voters approved the amendment by a vote of 69.2–28.6%.