Answer:
Number of banners which can be made by senior class using 9 yards of banner material which they bought is 24.
Solution:
The banner material bought by senior class for their float = 9 yards
Number of banners which can be made using
yards = 1
So number of banner which can be made using 1 yard =

So number of banner which can be made using
yards =

= 24 banners
Hence number of banners which can be made by senior class using 9 yards of banner material which they bought is 24.