Multiplying Fractions

Every time we extend a number system, e.g. going from integers to rational numbers, one of the first things we have to do is make sure we can still do all the basic things with our new numbers that we could with the old. In this lecture, we're going to start that process off by looking at how to multiply to fractions.

[miss.e.nakayu]

The sound doesn't work for the first minute or so.