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 found 72 seashells and 12 starfishes on the beach. She gaveAlyssa some of her seashells. She has 28 seashell. How manyseashells did she give to Alyssa?

44.0