Step 1 :Casey has a total of 38 ties in his closet, 28 of which he feels go well with his gray sportcoat.
Step 2 :The probability of an event is calculated by dividing the number of favorable outcomes by the total number of outcomes.
Step 3 :In this case, the favorable outcome is the tie going well with the sportcoat, and the total number of outcomes is the total number of ties.
Step 4 :So, we need to divide the number of ties that go well with the sportcoat by the total number of ties, which is \( \frac{28}{38} \).
Step 5 :This gives us a decimal probability of approximately 0.737.
Step 6 :However, the question asks for the answer in simplified fraction form.
Step 7 :To convert the decimal to a fraction, we simplify \( \frac{28}{38} \) to \( \frac{14}{19} \).
Step 8 :Final Answer: The probability the tie goes well with the jacket is \( \boxed{\frac{14}{19}} \).