00:01
So when we multiply fractions together, we multiply our numerator by our numerator and our denominator by a denominator.
00:08
But sometimes it's easier to simplify our numbers before we multiply them together, which this problem is a great example of.
00:16
We don't really want to do 25 times 27.
00:19
It'd be a lot easier if we could simplify before we do any multiplication.
00:24
So in order to simplify, we're going to find our greatest common factor between a numerator and a denominator.
00:31
So let's start with 25 and 10.
00:35
So to find our greatest factor, we want to find the greatest number that can divide evenly into each of these.
00:42
The good way to find this is to list some of the factors.
00:45
We know 10 can do 2 and 5, 2 times 5 is 10, and also 1 times 10.
00:52
So these are all of our factors for 10.
00:54
For 25, we have 5 times 5, and we have 1 times 25.
00:59
So which number is the greatest one common? well, it's five.
01:04
They both have five, and that is the biggest number...