Have you ever stared at a spreadsheet, struggling to make sense of percentage calculations that just don’t seem to add up? Whether it’s a confusing formula, a misstep with zero values, or an ...

Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Return on investment (ROI) measures the amount of ...

Q. I have prepared projections for a proposed project, and I want to calculate the internal rate of return. Instead of using Excel’s IRR function, should I use simple math formulas so others can ...

Have you ever trusted a tool to simplify your work, only to discover it might be quietly leading you astray? That’s exactly the risk you run with Excel’s “Percent Of” function. On the surface, it ...

Learn what the stated annual interest rate is and how to calculate it without compounding, plus how it compares to the ...