Pie chart displays incorrect percentage number. Need a fix, urgently! HELP!

I know how to use numbers, but can't figure out why its giving me a different percentile on the pie charts. We're talking about 20 percentile differences. Its common practice of me to copy tables or charts from one sheet and pasting it to another sheet. I know tables and charts are linked in one sheet are kept linked if its moved to another sheet, but I simply select the appropiate data from the same sheet in which I want the chart to be displayed in. I've never had issues with this before. So annoying. HELP! I'm on Numbers '09.

MacBook Pro, Mac OS X (10.5.5)

Posted on Dec 13, 2011 9:06 AM

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Dec 13, 2011 4:53 PM in response to mikesouthbeach

Hi Mike,


Numbers charts whatever data you supply and choose to include in the chart. With pie charts, the segment labels can be the numeric values or those values shown as a percentage (not percentile) of the total.


Without seeing what data you are supplying to the chart, it's difficult to determine what is actually happening here. Can you post a screen shot that includes both the (selected) chart showing the error and the data table used to produce that chart.


Regards,

Barry

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Dec 14, 2011 1:15 PM in response to mikesouthbeach

the values you have used for your pie chart cause what you are percieving as a problem.


you are using the values 100 and 22 as the slices for the pie.


The total is 122 (100 + 22), and the percentage for each value (of the total) is:


100/122 = 0.819672 => 82%

22/122 = 0.18033 => 18%

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Dec 14, 2011 10:36 PM in response to mikesouthbeach

As Wayne correctly notes, the chart is showing slices representing the two numbers 0.22 and 1.00 (22% and 100%), and labeling each with the percentage of the total (1.22) that each represents.


A pie chart always represents 100% as the 'whole pie'. In this case, your 'whole pie' appears to be $5000, and you want to represent $1100 as 22% of that whole pie.


That can be done, but the other, larger slice of the pie must be the portion necessary to make a total of $5000 when added to the $1100:

User uploaded file

Here H6, the cell showing 3900,, contains the formula =F6-G6, which subtracts the 22% value (1100) from the 100% value (5000) to determine the value necessary to make the whole pie represent 100% (ie. $5000).


Regards,

Barry

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Dec 15, 2011 5:59 AM in response to mikesouthbeach

If you want the slices to show the numbers from your table:

  • Select the chart,
  • Go to the Chart Inspector
  • Where it says "Format", choose "same as source data"


The size of each slice will continue to be determined the same way, as a percentage of the whole pie. The only thing different will be how the slices are labeled.

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Dec 15, 2011 9:10 AM in response to Barry

An accurate representation of these values, using the pie chart convention and having 5000 represent 100%, would look like this:


User uploaded file

Remember: In a pie chart, the full circle is ALWAYS the whole pie, and the whole pie is ALWAYS 100% of the pie.


Regards,

Barry

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Pie chart displays incorrect percentage number. Need a fix, urgently! HELP!

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