Oswego City School District
Regents Exam Prep Center: Percents of Increase, Decrease, Discount
Use this lesson with examples in planning instruction on percent of increase, decrease, and discount. In this resource, you'll find three questions with solutions on ways to determine percent.
National Council of Teachers of Mathematics
The Math Forum: Markdown Savings
This site from the Drexel University contains problems for practicing using percents, using a mock sale as the motif. A link takes you to a model solution.