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P02

Business Math & Spreadsheets

Percentages, growth, compounding and spreadsheet thinking: the math managers use every day, without the scary parts.

Start the course →10 lessons · first 2 free
  1. Percentages Without PanicPercent of, percent change, and the two traps that fool even experienced managers: going up then down, and points vs percent. · 10 minFree
  2. Margin vs MarkupSame price, same cost, two different percentages. Mix them up and you quietly lose money on every sale. · 10 minFree
  3. Growth Rates and CompoundingGrowth that builds on itself starts slow and then explodes. Learn to run it forward (what will we have?) and backward (how fast did we grow?). · 12 min🔒 VIP
  4. The Rule of 72One division tells you how long anything takes to double: savings, prices, debts, sales. The fastest piece of mental math in business. · 10 min🔒 VIP
  5. Averages That LieOne big order can make the average useless. Learn when to use the mean, the median and a weighted average, and how to spot an average that's hiding something. · 11 min🔒 VIP
  6. Spreadsheet Thinking: Cells and FormulasA spreadsheet is a calculator that remembers. Write one formula, copy it down, and change one number to update everything: the skill behind every business model. · 13 min🔒 VIP
  7. Lookups and ScenariosLet the spreadsheet find prices for you, then flip one cell to see your worst, base and best case. The two moves that turn a sheet into a decision tool. · 13 min🔒 VIP
  8. Charts That Tell the TruthThe same numbers can look like a boom or a flat line. Pick the right chart, start the axis honestly, and learn to spot the tricks in other people's slides. · 11 min🔒 VIP
  9. Estimating Anything (Fermi Problems)No data? No problem. Break a big unknown into small guesses you can defend, multiply them, and get within shouting distance of the truth in two minutes. · 11 min🔒 VIP
  10. Boss: Model a Café's First YearBuild the real thing: a 12-month model of Crumb's first year. Find the month it turns profitable, how low the cash dips, and how much money Priya needs to start. · 16 min🔒 VIP