Among all players drafted by the Toronto Maple Leafs, identify the percentage who are from Eastern Europe.
players refers to PlayerName; drafted by the Toronto Maple Leafs refers to overallby = 'Toronto Maple Leafs'; percentage = MULTIPLY(DIVIDE(SUM(nation = 'Eastern Europe'), COUNT(ELITEID) WHERE overallby = 'Toronto Maple Leafs'), 100); from Eastern Europe refers to nation in ('Belarus', 'Bulgaria', 'Czech Republic', 'Hungary', 'Moldova', 'Poland', 'Romania', 'Slovakia', 'Ukraine'); countries in a continent can be identified by referring to https://worldpopulationreview.com/country-rankings/list-of-countries-by-continent;
SELECT CAST(COUNT(CASE WHEN nation IN ('Belarus', 'Czech Rep.', 'Slovakia', 'Ukraine') THEN ELITEID ELSE NULL END) AS REAL) * 100 / COUNT(ELITEID) FROM PlayerInfo WHERE overallby = 'Toronto Maple Leafs'