Q: I found an anomaly with a rather simple Excel computation; specifically, Excel calculates 111,111,111 times 111,111,111 to equal 12,345,678,987,654,300, which is ...

This post explains how to calculate Weighted Average in Excel with percentages. In a standard arithmetic average where the sum of values is divided by the number of values, each data value is treated ...

Subtraction is the easiest way to count days between two dates in Excel. You can use the arithmetic operator – (minus sign) to subtract one date from another to find the number of days between them.