What was the difference in home team and away team win percentages across all divisions in 2010?
2010 refers to season = 2010; SUBTRACT(DIVIDE(COUNT(Div where FTR = 'H', season = 2010), COUNT(Div where season = 2010)), COUNT(Div where FTR = 'A', season = 2010), COUNT(Div where season = 2010)) as percentage;
SELECT CAST(COUNT(CASE WHEN FTR = 'H' THEN 1 ELSE NULL END) AS REAL) * 100 / COUNT(FTR) - CAST(COUNT(CASE WHEN FTR = 'A' THEN 1 ELSE NULL END) AS REAL) * 100 / COUNT(FTR) DIFFERENCE FROM matchs WHERE season = 2010