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:
Carbon nanotubes for water transport
Table title:
Major Factors Determining Desalination Potential
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Rolled up vector </th><th colspan=1 rowspan=1 > Inner diameter (nm) </th><th colspan=1 rowspan=1 > Salt rejection (%) </th><th colspan=1 rowspan=1 > Flow rate (LMH) [b] </th><th colspan=1 rowspan=1 > Enhancement [c] </th></tr>
<tr> <td colspan=1 rowspan=1 > (5,5) </td><td colspan=1 rowspan=1 > 0.32 </td><td colspan=1 rowspan=1 > 100 </td><td class="highlighted"  colspan=1 rowspan=1 > 66.7 </td><td colspan=1 rowspan=1 > 2.42 </td></tr>
<tr> <td colspan=1 rowspan=1 > (6,6) </td><td colspan=1 rowspan=1 > 0.49 </td><td colspan=1 rowspan=1 > 100 </td><td colspan=1 rowspan=1 > 112.5 </td><td colspan=1 rowspan=1 > 4.21 </td></tr>
<tr> <td colspan=1 rowspan=1 > (7,7) </td><td colspan=1 rowspan=1 > 0.59 </td><td colspan=1 rowspan=1 > 95 </td><td colspan=1 rowspan=1 > 175.0 </td><td colspan=1 rowspan=1 > 6.39 </td></tr>
<tr> <td colspan=1 rowspan=1 > (8,8) </td><td colspan=1 rowspan=1 > 0.75 </td><td colspan=1 rowspan=1 > 58 </td><td class="highlighted"  colspan=1 rowspan=1 > 270.8 </td><td colspan=1 rowspan=1 > 9.76 </td></tr>
</table>
Question:
How did the flow rate change from (5, 5) to (8, 8).
Answer:
The flow rate increased from 66.7 (LMH) to 270.8 (LMH).