The temperature at 5:00 a.m. was -23 °F. By 3:00 p.m., the temperature had risen to a high of 38 °F. If the temperature at 8:00 p,m. decreased from the high by 2/5of the change in temperature in Fahrenheit degrees from 5:00 a.m. to 3:00 p.m., what was the temperature at 8:00 p.m.? Round your answer to the nearest tenths place.