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: Oscar's bus ride to school is 0.75 mile and Charlie's bus ride is 0.25mile. How much longer is Oscar's bus ride than Charlie's?

0.5