The value went up to 100*3=$<<100*3=300>>300

So he gained 300-100=$<<300-100=200>>200

# Answer

200
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Mark buys a Magic card for $100, which then triples in value.  How much profit would he make selling it?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
200
Mark buys a Magic card for $100, which then triples in value.  How much profit would he make selling it?
train