CREATE TABLE table_name_80 (percentage INTEGER, points_for VARCHAR(255), losses VARCHAR(255), wins VARCHAR(255), points_against VARCHAR(255))
What is the average Percentage when there are more than 0 wins, Points Against is more than 481, Losses of 8, and a Points For larger than 826?
    
SQL: SELECT AVG(percentage) FROM table_name_80 WHERE wins > 0 AND points_against > 481 AND losses = 8 AND points_for > 826