Among the crimes in the Central, calculate the percentage of larceny incidents.
Central refers to side = 'Central'; larceny refers to title = 'Larceny'; percentage = divide(count(report_no where title = 'Larceny'), count(report_no)) where side = 'Central' * 100%
SELECT CAST(COUNT(CASE WHEN T3.title = 'Larceny' THEN T2.report_no END) AS REAL) * 100 / COUNT(T2.report_no) FROM Community_Area AS T1 INNER JOIN Crime AS T2 ON T2.community_area_no = T1.community_area_no INNER JOIN FBI_Code AS T3 ON T3.fbi_code_no = T2.fbi_code_no WHERE T1.side = 'Central'