Final answer:
By dividing the total number of students on the sapphire team (75) by 5, we find that there are 15 students in the band.
Step-by-step explanation:
To calculate the number of students in the band from the sapphire team, we need to determine what 1/5th of 75 students is. Since 1/5th means one part out of five equal parts, we divide the total number of students by 5.
Number of students in the band = Total number of students on the sapphire team / 5
Number of students in the band = 75 / 5
Number of students in the band = 15
Therefore, there are 15 students in the band from the sapphire team.