00:01
So when we multiply these fractions, we're going to multiply the numerator by the numerator and the denominator by the denominator.
00:08
There are two ways that we can attempt to multiply these fractions.
00:12
So the first way is to simply just multiply first.
00:16
3 times 10, we get 30.
00:18
And 5 times 21 is 105.
00:22
And now we can simplify this big fraction by dividing the top and bottom by a common factor, the largest common factor.
00:31
A number that can go into both of them evenly.
00:34
That number is 15.
00:36
So 30 divided by 15 is 2, and 105 divided by 15 is 7.
00:44
So our answer becomes 2 7s.
00:47
Finding that largest common factor is a little bit difficult, which is why we have another method...