Kayden recorded the grade-level and instrument of everyone in the middle school School of Rock below. Seventh Grade Students Instrument # of Students Guitar 8 Bass 15 Drums 8 Keyboard 10 Eighth Grade Students Instrument # of Students Guitar 13 Bass 3 Drums 6 Keyboard 9 Based on these results, express the probability that an eighth grader chosen at random will play the bass as a decimal to the nearest hundredth.