Adding a Group Number for every X amout of records

I have an excel spreadsheet with about 30000 records.
There is also a column call "Group Number".
I would like to create a group number for every 150 records.
For example;
rows 1 through 150 would be "1",
rows 151 through 300 would be "2", etc.
mnoisetteAsked:
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Saqib Husain, SyedEngineerCommented:
Enter this formula in a cell in the group number and copy it down.

=int((row()-1)/150)+1

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Microsoft Excel

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