Money basics, explained with real numbers
What does a profit margin actually measure? What is the difference between nominal and real dollars? These explainers define common money and economics terms and work through each one with real figures from public data.
They explain facts and definitions only. They do not give investment, tax or financial advice, and nothing here is a recommendation.
Guides
What is net profit margin? The formula, with 10 real company examples
Net profit margin = net income ÷ revenue. Worked examples from 10 large US companies' 10-K filings, from NVIDIA (55.6%) to Merck (28.1%).
Nominal vs real dollars: what $100 from 1975 equals in 2024 dollars
Nominal vs real dollars explained with CPI data: $100 in 1975 = $582.88 in 2024 dollars. Table for every 5 years and the conversion formula.