The histogram shows the ages of cars sold at a car auction.
what percent of the cars was less than 20 years old or more than 40 years old?

Adding up all of the values in the histogram, there were 20 cars sold in total. Of those, 5 were under 20 years old and 3 were more over 40. That means that 8/20 of the cars fit the bill. Multiplying the numerator and denominator by 5, we find that 8/20 = 40/100, or 40%.