A northwestern distribution company surveyed 58 of its midlevel managers. The survey obtained the ages of these managers, which later were organised into the frequency distribution shown. Based on class interval between 30-under 35, what is the Relative Frequency?

Class Interval	Frequency
20-under 25	9
25-under 30	7
30-under 35	7
35-under 40	12
40-under 45	15
45-under 50	8

*Round your answer to 4 decimal places.