Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many polling percentages were there in October 2008 when is was 30.8% in Aug 2008?

### Inputs:
table_name: table, columns: ['Party', 'Result, Parliam. election 2005', 'Result, County elections 2007', 'Aug 2008', 'Sep 2008', 'Oct 2008', 'Nov 2008', 'Dec 2008', 'Jan 2009', 'Feb 2009', 'Mar 2009', 'Apr 2009', 'May 2009', 'Jun 2009', 'Jul 2009', 'Aug 2009']

### Response:
SELECT COUNT Oct 2008 FROM table WHERE Aug 2008 = 30.8%