SELECT max(group_equity_shareholding) FROM operate_company
SELECT max(group_equity_shareholding) FROM operate_company <table_name> : operate_company col : id | name | Type | Principal_activities | Incorporated_in | Group_Equity_Shareholding row 1 : 1 | Air China | Corporate | Airline | China | 18.77 row 2 : 2 | Air China Cargo | Joint Venture | Cargo airline | China | 49.0 row 3 : 3 | Air Hong Kong | Joint Venture | Cargo airline | Hong Kong | 60.0 row 4 : 4 | Dragonair | Subsidiary | Airline | Hong Kong | 100.0 row 5 : 5 | Cathay Pacific Cargo | Subsidiary | Cargo airline | Hong Kong | 100.0 row 6 : 6 | Cathay Pacific Catering Services (HK) Limited | Subsidiary | Catering services | Hong Kong | 100.0 row 7 : 7 | Cathay Pacific Services Limited | Subsidiary | Cargo | Hong Kong | 100.0 row 8 : 8 | Cathay Pacific Holidays | Subsidiary | Travel agency | Hong Kong | 100.0 row 9 : 9 | Dragonair Holidays | Subsidiary | Travel agency | Hong Kong | 100.0 row 10 : 10 | Hong Kong Airport Services | Subsidiary | Ground handling | Hong Kong | 100.0 row 11 : 11 | Vogue Laundry Service Limited | Subsidiary | Laundry | Hong Kong | 100.0 row 12 : 12 | China Pacific Laundry Services | Joint Venture | Laundry | Taiwan | 45.0 row 13 : 13 | VN/CX Catering Services Limited | Joint Venture | Catering services | Vietnam | 40.0 row 14 : 14 | CLS Catering Services Limited | Joint Venture | Catering services | Canada | 30.0
col : max(group_equity_shareholding) row 1 : 100