This video is provided as supplementary material for courses taught at Howard Community College and 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 ok so we're going to start out with the order that's 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 that's the numerator over how much each tablet contains 200 milligrams and 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 multiply 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 it...

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