Another extension to our number system was the development of rational numbers which allow us to count pieces of a whole. Fractions, decimals and percent are all examples of rational numbers. After working with the video below, you'll be able to simplify fractions by "reducing" unneeded factors of 1.
This second video talks about multiplying fractions which is a second skill you'll need in this chapter. Today's material is covered on pages 19-24 in our text.