Database: formula_1
Question: How much faster in percentage is the champion than the driver who finished the race last in the 2008 Australian Grand Prix?
SQL: WITH time_in_seconds AS ( SELECT T1.positionOrder, CASE WHEN T1.positionOrder = 1 THEN (CAST(SUBSTR(T1.time, 1, 1) AS REAL) * 3600) + (CAST(SUBSTR(T1.time, 3, 2) AS REAL) * 60) + CAST(SUBSTR(T1.time, 6) AS REAL) ELSE CAST(SUBSTR(T1.time, 2) AS REAL) END AS time_seconds FROM results AS T1 INNER JOIN races AS T2 ON T1.raceId = T2.raceId WHERE T2.name = 'Australian Grand Prix' AND T1.time IS NOT NULL AND T2.year = 2008 ), champion_time AS ( SELECT time_seconds FROM time_in_seconds WHERE positionOrder = 1), last_driver_incremental AS ( SELECT time_seconds FROM time_in_seconds WHERE positionOrder = (SELECT MAX(positionOrder) FROM time_in_seconds) ) SELECT (CAST((SELECT time_seconds FROM last_driver_incremental) AS REAL) * 100) / (SELECT time_seconds + (SELECT time_seconds FROM last_driver_incremental) FROM champion_time)