Chris and Dana each bought 15 ounces of tea in an 18 ounce mug. Chris added 3 ounces of milk, stirred the tea well, and then drank 2 ounces. Dana drank 2 ounces of her tea and then added 3 ounces of milk. What is the resulting ratio of the amount of milk in Chris's mug to that in Dana's mug?