# Introduction to Tape Diagrams

## Opening

# Introduction to Tape Diagrams

A store sells 10 comedy DVDs for every 90 action DVDs.

This relationship can be shown using a *tape diagram*. In the tape diagram, each unit (each square) represents 10 DVDs. There is 1 unit of comedy DVDs and 9 units of action DVDs.

There are different ways to arrange the tape diagram. You can see the ratio between the two quantities of DVDs more easily in Tape Diagram 2.

- What is the ratio of action DVDs to comedy DVDs?
- What is the ratio of comedy DVDs to action DVDs?