Table:
text: List of Memorial Cup champions
Active teams
Active teams
Tournament_Appearances Team League Wins Final_Losses Semi_Final_Losses Fourth_Place_ Final_Win_ Years_of_appearance
3 Chicoutimi Saguenéens QMJHL 0 0 2 1 .000 1997, 1994, 1991
3 London Knights OHL 1 1 1 0 .500 2014, 2013, 2012, 2005
2 Shawinigan Cataractes QMJHL 1 1 0 0 .500 2012, 1985
2 Saint John Sea Dogs QMJHL 1 0 1 0 1.000 2012, 2011
3 Sault Ste. Marie Greyhounds OHL 1 1 0 1 .500 1993, 1992, 1991
2 Swift Current Broncos WHL 1 0 1 0 1.000 1993, 1989
2 Vancouver Giants WHL 1 0 1 0 1.000 2007, 2006
2 Calgary Hitmen WHL 0 1 1 0 .000 2010, 1999
2 Moncton Wildcats QMJHL 0 1 0 1 .000 2010, 2006

Question: What is the final winning percentage of Sault Ste. Marie Greyhounds of the Memorial Cup Champions ?