 So you need to figure out how to use fractions, right? Let's start talking about multiplying and dividing fractions first It's a lot easier than adding subtracting fractions Now as we talked about prime numbers are numbers that can only be divided evenly by one of themselves or let's rephrase Integers that can only be divided evenly by one of themselves now Rational numbers are numbers that can be expressed as a fraction of integers So if you start with rational numbers to understand rational numbers you have to understand integers and to understand integers You have to understand prime numbers you follow So that's the way it breaks down. So let's take some numbers and break them down and see what we can do Fraction, we're going to start off easy again Number two is a prime number Number six made up of two times three So two over six can really be written as two over two over two times three Now with fractions any number from the top can cast out any number from the bottom As long as there's no plus or subtraction sign between them again Not a construction, not a plus So any number from the top can cast out any number from the bottom as long as there's no Subtraction or addition between them. So two kills two Now when something dies it goes to one So two over six is really one Over one times three, which is three Let's do a harder one So harder harder fraction. Let's do actually let's do two fractions times each other. Yes two fractions multiplied together Seven, let's call it fictive break these numbers down. Yes. Yes 18 breaks down to two times nine and nine breaks down into three times three Whenever you break down numbers if they're branching off kill the number before it because you don't need it anymore You've already broken it down to score numbers So 18 goes and nine goes because we broke that nine into three times three. So 18 is really two Two times three times three Let's break down 50 50 breaks down into five times ten and ten breaks down into five times two So we kill the numbers before the wrong number. Don't kill the wrong numbers 25 breaks down to five times five Where are we? 25 breaks down to five times five and 15 breaks down to three times five. We got that so far now What we said with fractions is anything from the top can cancel out anything from the bottom as long as there's no addition or subtraction sign between the numbers So let's start killing numbers Anything from the top cancels anything from the bottom Five kills five. What do we got left? two kills two So the only numbers left up top are three and in the bottom we got so 25 over 15 times 18 over 50. It's really three over five That's how you reduce fractions. You got to break them down into their prime numbers once you do that It becomes easy to manage I'm gonna get more chalk to write down the final answer that pink or blue a little bit. You can think that Let's go pink as we got more of it. I'll answer for this three over five. Let's go do more