Database: student_club
Question: What is the percentage of the cost for the meeting events?
SQL: SELECT SUM(CASE WHEN T1.type = 'Meeting' THEN T3.cost ELSE 0 END) * 100 / SUM(T3.cost) FROM event AS T1 INNER JOIN budget AS T2 ON T1.event_id = T2.link_to_event INNER JOIN expense AS T3 ON T2.budget_id = T3.link_to_budget