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.
Lumen Technologies Inc, https://www.lumen.com/en-us/home.html, SIC Code: 4813, TELEPHONE COMMUNICATIONS, EXCEPT RADIOTELEPHONE
View Financial Statements Report for Lumen Technologies Inc