Multiplying your profit margin, asset turnover, and equity multiplier is how to calculate roe using dupont analysis? b. higher margin, and turnover, with lower leverage, generally causes a firm to have a higher return on equity. c. dupont analysis is useful because it allows us to see what is causing a firm's roe to change. d. financial ratios compare over time companies of different sizes and industries, and since not all sources calculate them the same way, managers should understand how they are derived.