00:01
So in order to add and subtract fractions, we need to find a common denominator.
00:08
So in order to do that, we're going to have to find the least common multiple between 14 and 21.
00:15
So we're going to list some multiples and see if we can find any that are in common between 14 and 21.
00:21
So for 14, we have 14, 28, 42, 56, etc.
00:27
For 21, we have 21, 42, and there you go, we have one in common, 42.
00:36
So this is the smallest number that they can both divide and 2.
00:39
42 can be divided by 21, and you get 2, and 42 divided by 14 is 3.
00:46
So now that we have our least common multiple of 42, we're going to transform each of the fraction so that they have a denominator of 42.
00:55
So 14 times 3 will give us a denominator...