Answer:
Percentage increase from September to October = 50%
Explanations:
Number of members in the music club in September = 16
Number of members in the music club in October = 24
Increase in members from September to October = 24 - 16
Increase in members from September to October = 8
Percent increase from September to October = (8/16) x 100
Percentage increase from September to October = 100/2
Percentage increase from September to October = 50%