These lyrics are to the tune of Cher Lloyd's "Want You Back".
The lyrics explore vocabulary such as commission, tax, discounts, and tips. It tells of 3 different ways to solve percents- proportions, finding 10% first, and multiplying by the decimal. The kids love this song and it is an awesome way to teach percents.
http://www.youtube.com/user/mathandIKnowIT
Copy and paste the above link and see this song and others in action in the classroom.