Jack works in a bookstore. he has 300 books to stock on the shelves. so far, he has stocked 120 books today. what percent of the books does he have left to stock?

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?