Try something like this, Carlos, assuming your 16-digit number is in column
C:

="A"&right(C2,1)
That'll add the letter A to the last character in C2

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Anne Troy
www.OfficeArticles.com

"Carlos" wrote in message
...
In excel I need to take the last digit of a 16 digit number from one
column
and then write it down into another column with a letter in front of it