CREATE TABLE table_name_63 (win_percentage INT, games_behind VARCHAR, wins VARCHAR)

What is the lowest percentage of wins for 6 games and more than 77 total wins?
SELECT MIN(win_percentage) FROM table_name_63 WHERE games_behind = "6½" AND wins > 77
SELECT MIN("win_percentage") FROM "table_name_63" WHERE "6½" = "games_behind" AND "wins" > 77