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Finance

18

Simple Interestprincipal × rate × time Compound Interestgrowth with contributions APR to APYnominal ⇄ effective rate Future Valuewhat a deposit becomes Present Valuewhat a future sum is worth now CAGRannualized growth rate ROIreturn on an investment NPVcash flows, discounted IRRthe rate that zeroes NPV Inflationpurchasing power over time Savings Goalcontribution to hit a target Retirementnest egg vs. income needed Withdrawalhow long a balance lasts Loan Paymentpayment + amortization schedule Mortgagepayment, taxes, insurance, PMI Refinancebreak-even on closing costs Debt Payoffmonths and interest to clear Break-evenunits and revenue to cover cost

Math

7

Margin and Markupcost, price, margin, markup Percent Increaseadd a percentage Percent Offdiscount and final price Percentagethree common percent tasks Percentage Changedifference between two values Ratiosimplify or solve a proportion Tiptip, total, per person

Converters

5

Data Storagebytes, decimal and binary Lengthmetric and US customary Temperaturecelsius, fahrenheit, kelvin Volumeliters, gallons, cups Weightgrams, kilograms, pounds