This document discusses ratio analysis, which is a technique used to evaluate a company's financial performance and position. Ratios are calculated by dividing one financial metric by another and can provide insights into a company's liquidity, profitability, efficiency, solvency, and market performance. Common ratios include the current ratio, net profit margin, accounts receivable turnover, debt-to-equity ratio, and price-to-earnings ratio. While ratio analysis uses historical data, it is a simple and cost-effective way to identify strengths and weaknesses when combined with qualitative factors.