Formatting financial statements in commn size can eliminate inherent bias' that usually occurs whenever analyzing companies of differing sizes. Common size also allows for the analysis of a company over various time periods rapidly, e.g. revealing what percentage of sales is cost of goods sold and how that value has changed over time.
PPG Industries, Inc., https://www.ppg.com/, SIC Code: 2851, PAINTS, VARNISHES, LACQUERS, ENAMELS, AND ALLIED PRODUCTS
View Financial Statements Report for PPG Industries, Inc.