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Discount
It explains what a discount is. It also explains how to calculate discount and discount percent.
Math Mammoth
Math Mammoth: How to Solve Basic Percent Word Problems, Part 1
This video demonstrates how to solve problems involving discounts to prices. [6:21]
Math Mammoth
Math Mammoth: Percent of Change: Applications
Demonstrates how to solve two problems about percentage change, one involving area and the other discounts. [7:17]