I have added some KPI widgets to a report. I am comparing plan versus actual headcount. however, I want the KPI to show the actual difference as a numeral, not as a percentage. Apptio is showing this:

But instead of the 0% Over (which just looks weird) I want it to show "4 Over". Not a percentage difference, but rather the simple difference.

The KPI component is actually just a specific HTML/CSS combination, so one option is to use an HTML report component to mimic a KPI:

The above KPI for instance was created via: (top) Ribbon > Insert > HTML.

Here's the HTML I used:

<ul class="kpi-bar-horizontal" style="-moz-border-radius: 6px;-webkit-border-radius: 6px;-khtml-border-radius: 6px;border-radius: 6px;background-color:white;border: 1px solid gray;padding:0px;margin:0px;width:99%">
    <li style="padding-left:5px;padding-right:5px;">
        <span class="kpi-bar-text1">
            Internal Headcount
        </span>
        <div class="kpi-bar-value">
            <span style="color:black">
                <%=NumberFormat(Labor Master Data.Labor Headcount,"###,###")%>
                <%=If(Labor Actual to Plan < 0, "<span class=""kpi-bar-pct-positive"">"&Abs(Labor Actual to Plan)&" Under", "<span class=""kpi-bar-pct-negative"">"&Labor Actual to Plan&" Over")%>
            </span>
        </div>
        <span style="font-size: 90%">
            <font color="#808080">
                Planned Internal Headcount: <%=NumberFormat(Planned Headcount,"###,###")%>
            </font>
        </span>
    </li>
</ul>

I also added a new metric (within the Metrics tab):

Labor Actual to Plan = Labor Master Data.Labor Headcount - Planned Headcount

...which the HTML code uses.

That's great! Thank you!