
In this video, students in a 7th grade class learn how to write a percent markup expression using a double number line. They are shown how to represent the cost of making a t-shirt as X and how to add a 30% markup to calculate the selling price.

In this video, students in a 7th grade class learn how to write a percent markup expression using a double number line. They are shown how to represent the cost of making a t-shirt as X and how to add a 30% markup to calculate the selling price.