Consider the following cumulative frequency distribution:

Class	Cumulative Frequency
15 up to 25	80
25 up to 35	110
35 up to 45	200
45 up to 55	240

a. Construct the frequency distribution.

Class Frequency

15 up to 25

25 up to 35

35 up to 45

45 up to 55

c. What percent of the observations are less than 35? (Round your answer to 1 decimal place.)

Percent of observations___________%