user: Question: What was the vote % of Heather and Matt?
Columns: ['Rank', 'Couple', 'Judges', 'Public', 'Total', 'Vote percentage', 'Result']
Types: ['real', 'text', 'real', 'real', 'real', 'text', 'text']
Sample row: [1.0, 'Hayley and Daniel', 11.0, 11.0, 22.0, '21.6%', 'Safe']
SQL:

assistant: SELECT "Vote percentage" FROM "Table" WHERE "Couple" = 'Heather and Matt';