What is the answer to this fraction problem 4/5 - 8/15?

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

There are 8 movies that you would like to see currently showing in theatres. in how many different ways can you choose a movie to see this saturday and one to see this sunday?

Whats the theoretical probability of popping a polka dot balloon? express your answer as a fraction, decimal and percent solid 15 polka dot 5 striped 17 plzz me due tomorrow