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Excel formula to return the lowest, closest number to another?

Posted on 2013-02-02
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Last Modified: 2013-02-02
I have a column of numbers between 1 and 5,000, in cells A1:A100

How do I write an Excel formula that returns the lowest, closest number to the number 1,000?

(For example, if the closest numbers to 1,000 are the numbers 900 and 1,100 -- it should return the number 900.)

Thanks.
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Question by:Cactus1994
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5 Comments
 
LVL 24

Expert Comment

by:Steve
ID: 38847446
The formula below should do the job:

=SMALL(A1:A100,COUNTIF(A1:A100,"<=1000"))
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Author Comment

by:Cactus1994
ID: 38847472
What happens in the event all my numbers are ABOVE 1,000? It doesn't seem to work. Thx.
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LVL 24

Expert Comment

by:Steve
ID: 38847487
The following will return "ALL GREATER" if there is not a number lower than  the chosen:
=IFERROR(SMALL(A1:A100,COUNTIF(A1:A100,"<=1000")),"ALL GREATER")
You can swap the "ALL GREATER" for whatever reponse suits.
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LVL 50

Accepted Solution

by:
barry houdini earned 500 total points
ID: 38847607
>How do I write an Excel formula that returns the lowest, closest number to the number 1,000?

Try this formula

=MIN(IF(ABS(A1:A100-1000)=MIN(ABS(A1:A100-1000)),A1:A100))

confirmed with CTRL+SHIFT+ENTER

If you have 999 and 1001 in the list the formula returns 999

regards, barry
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Author Closing Comment

by:Cactus1994
ID: 38847625
Hi Barry: Perfect. That works. Thanks to you, too, Barman, but I couldn't use a text filler.

Barry, would you mind taking a look at my other question, "Excel: Formula to Return an Answer Closest to a Target", too?

Seems like we were getting close and then the answers dropped off. Thanks!
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