Now, I went through a lot of pain here to show you that this really just comes from the word, from percent, from per 100. So we have 18% is the same thing as 0.18, which is the same thing, in simplest form, as 9/50. So this is the fraction in simplest form. And I don't think these guys share any common factors. And we're going to get 18 divided by 2 is 9. So we have 18 divided by 2 over 100 divided by 2. And they're both even numbers, so we know they're both divisible by 2, so let's divide both the numerator and the denominator by 2. And if we write it as a simplified fraction, we need to see if there is a common factor for 18 and 100. You could view this as 1 tenth and 8 hundredths, which is the same thing, or 10 hundredths and 8 hundredths, which is 18 hundredths. And we know how to write that in decimal form. Let's do the decimal first, just because that's actually what I said I would do first. From here we can go straight to a decimal or we could do this fraction in simplest form. This literally means 18 per 100, or 18 hundredths. We're literally doing the fraction first. 18 per 100 as a fraction literally means 18/100. Actually, I said I would do the decimal first, but we can start putting it into a fraction first. I'm actually separating out the percent, it's only going to be one word, but I'm writing it as, literally, per cent. So 18% is the same thing as 18 per 100, or 18 per cent. 0:00 Write 18% as a decimal and as a fraction in simplest form.
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