The Yankees have actually won 25% of all the World Series. There have been 106 world series played to this date, and the Yankees won 27 of them. They have one 1/4 or a quarter of all the world series.
0.478 is the NY Mets' lifetime winning pct
Through the 2013 season, the New York Yankees have 9,947 wins, 7,570 losses for an all-time winning percentage of .568
The 2009 New York Yankees won 103 games and lost 59 during the regular season for a .636 winning percentage.
The New York Mets' winning percentage in 2010 was .488.
The 1986 New York Mets had a record of 108-54 for the highest winning percentage in franchise history with .667.
The Royals won.
No Mets player or coach wore the number 9 during their World Series winning 1986 season
From 1962 through the 2009 season the New York Mets have a win-loss record of 3,655 - 3,981
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New york yankees
I am adding to the answer because the information supplied by the responder has some noteworthy information on the NY Yankees. That answer can be seen in the last two paragraphs. The best New York Yankee lifetime winning percentage by a starting picther is held by Lefty Gomez. He pitched in the 1930's and had a winning percentage of .839. Whitey Ford had a career .690 win percentage for a career, one of the best for any team. Ron Guidry's .893 win percentage in 1978 is also one of the best for any starting pitcher on any team.
The 1998 New York Yankees had a record of 114-48 for a .704 winning percentage in a 162 game schedule. The 1927 New York Yankees had a record of 110-44 for a ,714 winning percentage in a 155 game schedule. The 1961 New York Yankees had a record of 109-53 for a .673 winning percentage(163 games) The 1927, and the 1961 New York Yankees are considered to be the best Yankees team of all time.
The 1998 New York Yankees had a record of 114 wins, and 48 losses for a .704 winning percentage in a 162 game schedule. The 1927 New York Yankees had a record of 110 - 44 for a .714 winning percentage in a 155 game schedule.
New York Mets was created in 1962.
He is the mascot for the new york mets