user: Question: What is the seat percentage when vote percentage is 2.4% (-8.3)?
Columns: ['Party', 'Party-list votes', 'Vote percentage', 'Total seats', 'Seat percentage']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Social Democratic Party (SPD)', 123875.0, '42.6% (+9.2)', '47 (+10)', '47.0%']
SQL:

assistant: SELECT "Seat percentage" FROM "Table" WHERE "Vote percentage" = '2.4% (-8.3)';