Facts101 is your complete guide to Ratio and Proport. Dosage Calculations. In this book, you will learn topics such as Ratio and Proportion/The Metric and Household Systems, Converting from One System of Measurement/Oral Medication Doses, Syringes, and Preparation of Solutions plus much more. With key features such as key terms, people and places, Facts101 gives you all the information you need to prepare for your next exam. Our practice tests are specific to the textbook and we have designed tools to make the most of your limited study time.