00:01
Let's evaluate the expression 5 over 24 minus 8 over 15.
00:04
And because we're working with fractions and that they're being subtracted from one another, we know that we need to find a common denominator between the two in order to actually subtract one from the other.
00:14
So looking at our denominators right here, it doesn't look like there's any easy to see common denominator.
00:21
So i'm just going to multiply the denominators by each other and that will definitely give us one that's in common.
00:26
So let's take 24 times 15.
00:28
That gives us 360.
00:31
So let's use 360 as our common denominator between these two.
00:35
And now we need to find out what our numerators are.
00:38
So to do that, we just multiply that by whatever we multiplied that denominator by.
00:42
So for this first fraction of 5 over 24, we multiplied 24 by 15.
00:47
So we're going to multiply 5 by 15 as well, which gives us 75 for the numerator.
00:52
Doing the same thing for 8 over 15, seeing that 15 was multiplied by 24, we're going to multiply 8 by 20.
00:59
And that gives us 192 for the numerator...