Table:
text: Kolkata Knight Riders
Overall results in CLT20
Result summary in Champions League
Opposition Span Lost Tied Win_
Auckland Aces 2011–2012 1 0 50.00
Chevrolet Warriors 2011–2011 0 0 100.00
Delhi Daredevils 2012–2012 1 0 0.00
Perth Scorchers 2012–2012 0 0 0.00
Royal Challengers Bangalore 2011–2011 0 0 100.00
Somerset Sabres 2011–2011 2 0 0.00
South Australia Redbacks 2011–2011 1 0 0.00
Nashua Titans 2012–2012 0 0 100.00

Question: What is the lowest win percentage for Kolkata Knight Riders when Perth Scorchers is the opponents Champions League Totals Summary in clt20?