Morgan 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 2
Drums 6
Keyboard 3
Eighth Grade Students
Instrument # of Students
Guitar 8
Bass 7
Drums 7
Keyboard 12

Based on these results, express the probability that a student chosen at random will play an instrument other than guitar as a decimal to the nearest hundredth.