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

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

# Answer

200
Question:
Mark buys a Magic card for $100, which then triples in value.  How much profit would he make selling it?
Answer:
Let's think step by step.

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