Definition: You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.
Input: Joan's high school played 864 baseball games this year, 128 of thegames were played at night. She attended 395 games. How manybaseball games did Joan miss?

469.0