An electrician bought 80 feet of electrical wire and used 65 feet of it. what percent of the wire went unused? 4.33% 8.125% 15% 18.75%

Can someone pls ! pls answer all. no explanation needed..

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?