how to calculate rate of return of call/put option

popper33

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Sep 16, 2010
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Question:
What would be the profit or loss per share of stock to an investor who bought the
October maturity IBM call option with exercise price $100, if the stock price at the
expiration of the option is $104?

My answer:
The payoff to the call option is 104-100= $4.
The call cost $1.80 (given in graph). The profit is $2.20 per share.


My question is..with the answer above how would i calculate the rate of return? please help. thanks! (which numbers would i use to plug into the ror forumla)
 
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