Business Math For Dummies Cheat Sheet - dummies Business Math For Dummies Cheat Sheet. Math is an important part of managing business. Get to know some commonly used fractions and their decimal equivalents, area and perimeter formulas, angle measurements, and financial formulas — including understanding interest rates and common financial acronyms — to help with your business tasks. Financial Formulas - dummies Part of Business Math For Dummies Cheat Sheet Formulas are an important part of business. A formula qualifies as such when it consistently gives you correct results and answers to questions thus providing organization and structure.