This document provides an introduction to ratio analysis and outlines various types of ratios used to evaluate business performance and financial health. It discusses current, liquid, debt-to-equity, and other ratios that measure liquidity, solvency, turnover, and profitability. Specific ratios are defined, such as current ratio, liquid ratio, debt-to-equity ratio, and gross profit ratio. Examples of ratios for years 2007-08 through 2009-10 are given for an example company. The document emphasizes that ratios should be compared over time and to industry benchmarks to truly understand a company's financial position.