(DOCSP-14076): Added details about viewing the percentage of the whole. (#450)

* (DOCS-14076): Added details about viewing the percentage of the whole.

* (DOCS-14076): Fixed links.

* (DOCS-14076): Incorporated Jeff's feedback.

* (DOCSP-14076): Fixed Typo.

Author: corryroot

source/interact-with-charts.txt

@@ -84,3 +84,20 @@ Pan
 ~~~
 
 To pan the chart, click and drag over the chart surface. 
+
+View the Percentage of the Whole
+--------------------------------
+
+Chart viewers can hover on each data point to view the value as a 
+percentage of the whole. The part to whole relationship appears in the 
+tooltip for the data point. This behavior applies to any chart type 
+that displays a part of the whole relationship, specifically:
+
+- :ref:`100% Stacked Bar Charts <one-hundred-stacked-example>`
+- :ref:`100% Stacked Column Charts <stacked-ref-example>`
+- :ref:`100% Stacked Area Charts <one-hundred-stacked-area>`
+- :ref:`Donut Charts <donut-chart-ref>`
+
+For stacked charts, the whole value is the total value of the 
+current category. For donut charts, the whole value is the total
+value of the entire chart.