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Thread: Find row number of column when it reaches 80% of total

  1. 01-10-2012, 02:01 PM #1
    bryanbak3
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    Find row number of column when it reaches 80% of total

    Hi all,

    i have a column that has gross charges in it and i'm trying to write a formula to show me the row number that is equal to eighty percent of the total column when adding from top to bottom. The values are sorted in descending order. Basically i'm trying to use pareto principle on this column.

    Thanks
    FORMULA CHECK.xlsx
    Last edited by bryanbak3; 01-10-2012 at 03:43 PM.
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  2. 01-10-2012, 02:29 PM #2
    NBVC
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    Re: Find row number of column when it reaches 80% of total

    43,000+rows is quite hefty for this type of calculation:

    Try:

    =MATCH(TRUE,SUBTOTAL(9,(INDIRECT(TRANSPOSE("A2:"&ADDRESS(ROW(INDIRECT("1:43127")),1)))))>=SUM($A$2:$ A$43127)*0.8,0)

    confirmed with CTRL+SHIFT+ENTER not just ENTER.

    It may take a little time to process....

    I found even using a helper column to cumulatively sum column A was slow....
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  3. 01-10-2012, 02:34 PM #3
    Haseeb A
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    Re: Find row number of column when it reaches 80% of total

    With CTRL+SHIFT+ENTER, rather than just ENTER

    =MATCH(SUM(A:A)*80%,SUMIF(OFFSET(A1,,,ROW(A1:A43126)-ROW(A1)+1),"<9E300"))+1
    HTH; Haseeb

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  4. 01-10-2012, 03:41 PM #4
    bryanbak3
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    Re: Find row number of column when it reaches 80% of total

    Thanks so much this seems to work, albeit slowly!
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  5. 01-10-2012, 04:02 PM #5
    Haseeb A
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    Re: Find row number of column when it reaches 80% of total

    To get speed up. Use a helper column like,

    in B2 enter =A2, then in b3: =A3+B2 then copy down.

    Then use.

    =MATCH(LOOKUP(9E300,B:B)*80%,B:B)+1
    HTH; Haseeb

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  6. 01-10-2012, 04:10 PM #6
    bryanbak3
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    Re: Find row number of column when it reaches 80% of total

    Ok, what does the 9e300 stand for?
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  7. 01-10-2012, 04:18 PM #7
    Haseeb A
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    Re: Find row number of column when it reaches 80% of total

    See this link,

    http://www.excelforum.com/excel-2007...-refer-to.html
    HTH; Haseeb

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