This video is provided as supplementary material for courses taught at Howard Community College. In this video, I want to do a couple of basic examples of calculating drug dosages. So here's the first problem: The order reads 600 milligrams. The tablets contain 200 milligrams. How many tablets should be given? Okay, so we're going to start out with the order, which is 600 milligrams. That's going to be the beginning of the left side of an equation. The right side of the equation is going to tell me how many tablets should be given. So I'm going to leave a space for the number of tablets and I'll just write the unit, which is tablets. I know that each tablet contains 200 milligrams. I'm going to take that information and make a fraction. The fraction is going to be one tablet (numerator) over how much each tablet contains, 200 milligrams (denominator). Since I'm dealing with fractions, I might want to take the 600 milligrams and make that into a fraction. I'll just put it over one. You don't have to do that, but if it makes it easier for you, you can. When I'm dealing with fractions, I want to multiply all of the numerators across and then multiply all the denominators. But before that, I want to see if I can simplify what I've got. Well, I've got milligrams in both the numerators and the denominators, so I'm going to cancel out the milligrams. I've got 600 and 200, so I know I could divide both of these numbers by 100. So, let's turn that 600 to a six by crossing off the two zeroes. Turn the 200 into a 2 by crossing out the two zeroes. I've got a six and I've got a two. I could simplify that. I...