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Math Help - I can't for the life of me figure this out!!!!

  1. #1
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    I can't for the life of me figure this out!!!!

    Sorry for the vague subject header, but this problem is driving me crazy!!! . I'm trying to figure out the average volume distribution on a daily basis within a month as a percentage contribution. In other words, every Monday in August accounts for 5% of our volume for that month, every Tuesday accounts for 3.5%, every Saturday accounts for 1.5%, etc.

    Here is the data that I have:

    1)Days in month =31

    2)Weeks in month =4.4

    3)# of occurances for each day within month:
    Mon, Sat, Sun = 5
    Tue-Fri =4

    4)% Contribution for each day within a normal week
    Monday =21%
    Tuesday =18%
    Wednesday =17%
    Thursday =16%
    Friday =18%
    Saturday =8%
    Sunday =2%

    5)Average Day contribution to week (day/days in week) =14.3%

    6)Average Daily Contribution to month (day/days in month) =3.2%


    How do i calculate the Daily contribution for each day over a month? Could anyone give me a hand?
    Last edited by uneakbreed; August 4th 2009 at 12:29 PM.
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  2. #2
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    Jul 2009
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    I've gotten close

    I thought i figured it out, but when i tried to check my work, i came up with 99.9376% instead of 100% when i summed every-days contribution.

    I tried:


    x= AvgNumberOfWeekdaysMonth* \frac{AvgDayContributionToMonth}{AcutalNumberOfWee  kdayInMonth}


    % Contribution of Individual Day to Month = ActualContributionOfWeekdayToWeek *\frac{x}{AvgContributionOf WeekdayToWeek}<br />

    Any ideas?
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  3. #3
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    Jul 2009
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    got it

    looksl like i overcomplicated it. got it!
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