Editing Pie chart (section)

==Example==
[[Image:Pie chart EP election 2004.svg|thumb|A pie chart for the example data]]
The following example chart is based on preliminary results of the [[2004 European Parliament election|election for the European Parliament in 2004]]. The table lists the number of seats allocated to each party group, along with the derived percentage of the total that they each make up. The values in the last column, the derived central angle of each sector, is found by taking that percentage of 360.

{| class="wikitable"
!Group           !! Seats !! Percent (%) !! Central angle (°)
|-
|[[European United Left–Nordic Green Left|EUL]] ||   39  ||     5.3     ||  19.2
|-
|[[Party of European Socialists|PES]]         ||  200  ||    27.3     ||  98.4
|-
|[[European Free Alliance|EFA]]        ||   42  ||     5.7     ||  20.7
|-
|[[Europe of Democracies and Diversities|EDD]]         ||   15  ||     2.0     ||   7.4
|-
|[[European Liberal Democrat and Reform Party|ELDR]]        ||   67  ||     9.2     ||  33.0
|-
|[[European People's Party|EPP]]         ||  276  ||    37.7     || 135.7
|-
|[[Union for Europe of the Nations|UEN]]         ||   27  ||     3.7     ||  13.3
|-
|Other           ||   66  ||     9.0     ||  32.5
|-
|Total           ||   732 ||    99.9*    || 360.2*
|}
<nowiki>*</nowiki>Because of [[rounding]], these totals do not add up to 100 and 360.

The size of each central angle is proportional to the size of the corresponding quantity, here the number of seats. Since the sum of the central angles has to be 360°, the central angle for a quantity that is a fraction ''Q'' of the total is 360''Q'' degrees.
In the example, the central angle for the largest group (European People's Party (EPP)) is 135.7° because 0.377 times 360, rounded to one decimal place, equals 135.7.