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:
1936 United States presidential election in Illinois
Table title:
Results
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Party </th><th colspan=1 rowspan=1 > Candidate </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > Democratic </td><td class="highlighted"  colspan=1 rowspan=1 > Franklin D. Roosevelt (inc.) </td><td colspan=1 rowspan=1 > 2,282,999 </td><td class="highlighted"  colspan=1 rowspan=1 > 57.70% </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > Republican </td><td class="highlighted"  colspan=1 rowspan=1 > Alf Landon </td><td colspan=1 rowspan=1 > 1,570,393 </td><td class="highlighted"  colspan=1 rowspan=1 > 39.69% </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Union </td><td colspan=1 rowspan=1 > William Lemke </td><td colspan=1 rowspan=1 > 89,439 </td><td colspan=1 rowspan=1 > 2.26% </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > n/a </td><td colspan=1 rowspan=1 > Write-ins </td><td colspan=1 rowspan=1 > 13,691 </td><td colspan=1 rowspan=1 > 0.35% </td></tr>
<tr> <th colspan=3 rowspan=1 > Total votes </th><td colspan=1 rowspan=1 > 3,956,522 </td><td colspan=1 rowspan=1 > 100% </td></tr>
</table>
Question:
What percentage of the popular vote did the top two candidates receive in the 1936 presidential election in Illinois?
Answer:
In the 1936 United States presidential election, Illinois was won by incumbent Franklin D. Roosevelt with 57.70% of the popular vote against Alf Landon with 39.69% of the popular vote.