Answer: 75%
Step-by-step explanation:
We are told that in a group of 120 band students 30 of them play a woodwind instrument. The number of those that don't play woodwind instrument would be:
= 120 - 30 = 90
The percent of the band students that do not not play a woodwind instrument will be:
= 90/120 × 100
= 3/4 × 100
= 75%
