What is the percentage of unemployed students who have been absent for 5 months from school?
percentage refers to DIVIDE(COUNT(month > 5), COUNT(month))
SELECT CAST(SUM(IIF(T1.month > 5, 1, 0)) AS REAL) * 100 / COUNT(T1.month) FROM longest_absense_from_school AS T1 INNER JOIN unemployed AS T2 ON T1.name = T2.name