<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format" >
     <fo:layout-master-set>
          <fo:simple-page-master master-name="test-page-master" page-width="8.5in" page-height="11in">
               <fo:region-body margin-top="0.4in"/>
               <fo:region-before extent="0.3in"/>
          </fo:simple-page-master>
     </fo:layout-master-set>
     <fo:page-sequence master-name="test-page-master">
          <fo:flow flow-name="xsl-region-body">
               <fo:block padding-bottom="25%" background-color="silver">This element should have a bottom padding of 25%, which is calculated with respect to the width of the parent element. This will require extra text in order to test. Both the content background and the padding should be aqua (light blue).</fo:block>
          </fo:flow>
     </fo:page-sequence>
</fo:root>