The mapping of votes to seats is not 1 to 1. For one, parties under a certain threshold (5%, I think) are eliminated. If 10% of the votes cast are eliminated this way (i.e. 3 parties getting on average 3.33%), only 90% of the votes remain, of which 45% is an even half. It is currently expected that the FDP and the BSW tankies will be eliminated.
The mapping of votes to seats is not 1 to 1. For one, parties under a certain threshold (5%, I think) are eliminated. If 10% of the votes cast are eliminated this way (i.e. 3 parties getting on average 3.33%), only 90% of the votes remain, of which 45% is an even half. It is currently expected that the FDP and the BSW tankies will be eliminated.