Java Development Tools

hi experts,

first-of fall have a good moring to my friends.

first thing1: Percentage %is not printing

<af:column headerText="Percentage(.%)"  id="c3" align="right"
                       width="120">
                 <af:outputText value="#{row.SumOfDuePercentage}" id="ot5"/>
                <f:facet name="footer">
                <h:panelGrid columns="1" id="pg2" style="text-align:right;" width="100%">
                <af:outputText value="#{bindings.SumOfDuePercentage1.inputValue}" id="ot6">
                    <af:convertNumber type="percent" />
                  </af:outputText>
                </h:panelGrid>
              </f:facet>
            </af:column>

second thing:
i want to round off values which are all shown in (percentage .%) column

i searched 11g handbook using how to round-off using groovy.
not yet found may be i missed.?

see pics.
http://imageshack.us/photo/my-images/853/app1c.png/

-jdev11.1.1.5.0
thanks&&Regards
adf7.