Last school year, Pecan Shores School District had 150 school days on the calendar. During the school year, Pecan Shores had to cancel 9 school days because of a hurricane and 6 days because of an ice storm. What percent of the school days did the school district have to cancel?

We just started the introduction into circles and i have no idea how to do this.

There are 3232 forwards and 8080 guards in leo's basketball league. leo must include all players on a team and wants each team to have the same number of forwards and the same number of guards. if leo creates the greatest number of teams possible, how many guards will be on each team?

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?