LCM function
This article describes the formula syntax and usage of the LCMfunction in Microsoft Excel.
Description
Returns the least common multiple of integers. The least common multiple is the smallest positive integer that is a multiple of all integer arguments number1, number2, and so on. Use LCM to add fractions with different denominators.
Syntax
LCM(number1, [number2], ...)
The LCM function syntax has the following arguments:

Number1, number2,... Number1 is required, subsequent numbers are optional. 1 to 255 values for which you want the least common multiple. If value is not an integer, it is truncated.
Remarks

If any argument is nonnumeric, LCM returns the #VALUE! error value.

If any argument is less than zero, LCM returns the #NUM! error value.

If LCM(a,b) >=2^53, LCM returns the #NUM! error value.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How do I copy an example?

Select the example in this article.
Important Do not select the row or column headers.
Selecting an example from Help

Press CTRL+C.

In Excel, create a blank workbook or worksheet.

In the worksheet, select cell A1, and press CTRL+V.
Important For the example to work properly, you must paste it into cell A1 of the worksheet.

To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
After you copy the example to a blank worksheet, you can adapt it to suit your needs.

