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Fred arrives at the subway station every day at a random time and takes the first train that arrives. If he takes the A train, which arrives each hour on the hour, he ends up at the fitness center. If he takes the B train, which arrives every hour 15 minutes after the A train, he ends up at the park. If Fred plays this game over a long period of time, about what percent of the time can he expect to end up at the park?

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