looking for the answer to b. please explain how you got each value thank you

A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 60 thousand miles and a standard deviation of 10 thousand miles. Complete parts (a) through (c) below. a. What proportion of trucks can be expected to travel between 47 and 60 thousand miles in a year? The proportion of trucks that can be expected to travel between 47 and 60 thousand miles in a year is 0.4032 (Round to four decimal places as needed.) b. What percentage of trucks can be expected to travel either less than 40 or more than 75 thousand miles in a year? The percentage of trucks that can be expected to travel either less than 40 or more than 75 thousand miles in a year is % (Round to two decimal places as needed.) Enter your answer in the answer box and then click Check