Task: Question Answering
Input (English): Passage: 1% of those at school in the South-East gained no GCSE passes in 2010; Portsmouth was most with 2.5%, and Windsor and Maidenhead had the lowest with 0.2%. For school free school meals, the region has the lowest percentage in England with 7.2%; the highest percentage is Southampton with 17%, and the lowest is Wokingham with 3.5% (the second lowest in England after Rutland); Buckinghamshire is 4.3%, then Bracknell Forest and Surrey are 4.9%. For truancy, the highest is South Bucks at 7.0, then Canterbury 7.0, Portsmouth 6.9, Thanet 6.9, Southampton 6.4, and Rushmoor 6.1. The lowest truancy percentages are for Tandridge 2.5, Windsor & Maidenhead 2.5, and Slough 2.5. 
Question: How many more percentage points in truancy did South Bucks have over Slough? 
Answer type: Number 
Output (English): 4.5.