Question: What is the percentage ratio of students who are enlisted in foreign legions that have a due payment?
SQL: SELECT CAST(SUM(IIF(T1.bool = 'pos', 1, 0)) AS REAL) * 100 / SUM(IIF(T1.bool = 'neg', 1, 0)) FROM no_payment_due AS T1 INNER JOIN enlist AS T2 ON T1.`name` = T2.`name` WHERE T2.organ = 'foreign_legion'