Write SQL query to solve given problem: Among all the teams that made the playoffs in the 2007-2008 season, identify the percentage that played over 20 games.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CAST(COUNT(CASE WHEN GP > 20 THEN TEAM ELSE NULL END) AS REAL) * 100 / COUNT(TEAM) FROM SeasonStatus WHERE SEASON = '2007-2008' AND GAMETYPE = 'Playoffs'