Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/dto/TblUserDTO.java
===================================================================
diff -u -r7c12721027454f10b087240a31a83612efa41057 -re21e870a2003f3a083b7513bf4befac0419a962b
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/dto/TblUserDTO.java	(.../TblUserDTO.java)	(revision 7c12721027454f10b087240a31a83612efa41057)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/dto/TblUserDTO.java	(.../TblUserDTO.java)	(revision e21e870a2003f3a083b7513bf4befac0419a962b)
@@ -35,7 +35,10 @@
     }
 
     public Integer getCorrectAnswerCountPercentDelta() {
-	return iraCorrectAnswerCount == null || traCorrectAnswerCount == null ? null
+	if (iraCorrectAnswerCount == null || traCorrectAnswerCount == null) {
+	    return null;
+	}
+	return iraCorrectAnswerCount.equals(0) ? traCorrectAnswerCount * 100
 		: (traCorrectAnswerCount - iraCorrectAnswerCount) * 100 / iraCorrectAnswerCount;
     }
 
Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/TblMonitoringController.java
===================================================================
diff -u -r5ec97b3aeeef6b5a5adfef19bcc48d48417998ce -re21e870a2003f3a083b7513bf4befac0419a962b
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/TblMonitoringController.java	(.../TblMonitoringController.java)	(revision 5ec97b3aeeef6b5a5adfef19bcc48d48417998ce)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/TblMonitoringController.java	(.../TblMonitoringController.java)	(revision e21e870a2003f3a083b7513bf4befac0419a962b)
@@ -221,8 +221,9 @@
 		    chartTraDataset.add(traCorrectAnswerCount);
 		    chartNamesDataset.add(group.getGroupName());
 
-		    long correctAnswerCountPercentDelta = Math
-			    .round((traCorrectAnswerCount - iraCorrectAnswerCountAverage) * 100
+		    long correctAnswerCountPercentDelta = iraCorrectAnswerCountAverage.equals(0d)
+			    ? traCorrectAnswerCount * 100
+			    : Math.round((traCorrectAnswerCount - iraCorrectAnswerCountAverage) * 100
 				    / iraCorrectAnswerCountAverage);
 		    group.setCorrectAnswerCountPercentDelta(correctAnswerCountPercentDelta);
 		    deltaSum += correctAnswerCountPercentDelta;