He earns $80 from werewolf removal because 8 x 10 = <<8*10=80>>80

He earned $25 from vampire removal because 105 - 80 = <<105-80=25>>25

He removed 5 vampires from town because 25 / 5 = <<25/5=5>>5

There were 10 vampires because 5 / .5 = 10

There were 40 werewolves because 4 x 10 = <<4*10=40>>40

The proportion of werewolves that he removed was .2 because 8 / 40 = <<8/40=.2>>.2

The percentage of werewolves removed was 20% because 100 x .2 = <<100*.2=20>>20

# Answer

20
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Van Helsing gets paid by the town to remove all the vampires and werewolves. He gets $5 per vampire and $10 per werewolf. He removes half the vampires and removes 8 werewolves, and earned $105. There were 4 times as many werewolves as vampires. What percentage of the werewolves did he remove?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
20
Van Helsing gets paid by the town to remove all the vampires and werewolves. He gets $5 per vampire and $10 per werewolf. He removes half the vampires and removes 8 werewolves, and earned $105. There were 4 times as many werewolves as vampires. What percentage of the werewolves did he remove?
train