Excel will calculate the number of days between the dates entered in cells B3 and A3 and display the result in cell C3. Take your mouse pointer to the lower-right corner of cell C3.

Percentages aren't always easy to calculate, but one of the best tools in Excel's toolbox is calculating percentages for you. Here's how to do it.

If you need to check for the number of leap years between two dates in Excel, please read through this article. A leap year has one day more than a non-leap year, but it impacts a lot of calculations.