This document discusses ratios, proportions, and their properties. It begins by defining a ratio as one number divided by another and provides examples of ratios. It then explains that proportions are equations where two ratios are equal, and outlines some key properties of proportions, including that the product of the means equals the product of the extremes. The document concludes by providing examples of ratio and proportion problems.

1. Ratio, Proportion, and Similarity 7-1 Ratio and Proportion 7-2 Properties of Proportions

9. Properties of Proportions Means Extremes