okay so since it is a pie chart and is circular then the overall degrees would be 360. if you divide 360 by 100 then you would get 3.6 which is what each percent of the pie chart is worth as an angle. okay so then you would multiply the 45 by 3.6 and you would get 162. the answer you are looking for is 162 degrees.
if this is correct please give brainliest