A realtor is displaying the histogram below, which summarizes the percentage of appreciation in value (over the past five years) for each of a sample of 25 houses in Newburg Park. Frequency 4. 2- 4 3 6 8 4 0. 0 10 20 30 Appreciation (in percent) 40 50 Based on the histogram, find the proportion of appreciation percentages in the sample that are at least 20 percent. Write your answer as a decimal, and do not round your answer.