Learn how to create a drop-down list in Excel without or with color using conditional formatting and data validation rules.

Learn how to change the default file format for saves in Word, Excel, and PowerPoint, so that you do not need to change it every time.

How to calculate return on investment (ROI), the money an investment made relative to its cost, in Microsoft Excel.

Excel and Google Sheets have three functions to calculate the internal rate of return: IRR, XIRR, and MIRR. Learn how these functions can calculate investment returns.