Database: california_schools
Question: Among the schools with an SAT excellence rate of over 0.3, what is the highest eligible free rate for students aged 5-17?
SQL: SELECT MAX(CAST(T1.`Free Meal Count (Ages 5-17)` AS REAL) / T1.`Enrollment (Ages 5-17)`) FROM frpm AS T1 INNER JOIN satscores AS T2 ON T1.CDSCode = T2.cds WHERE CAST(T2.NumGE1500 AS REAL) / T2.NumTstTakr > 0.3