diff --git a/bundles/dashboard/models/graphs.php b/bundles/dashboard/models/graphs.php
index 255e599..182c39d 100755
--- a/bundles/dashboard/models/graphs.php
+++ b/bundles/dashboard/models/graphs.php
@@ -199,7 +199,8 @@ class graphs {
         $input['numberReads'] = $this->groupBySum($input['numberReads'], 'createdAt', 'numberReads');

         foreach($input['numberPublications'] as $key => $x) {
-            $result[$key] = (( $input['numberPublications'][$key] / $input['numberReads'][$key] ) * 100);
+            $numberReads = ($input['numberReads'][$key] == 0) ? 100 : $input['numberReads'][$key];
+            $result[$key] = (( $input['numberPublications'][$key] / $numberReads ) * 100);
         }

         return $result;



/////
When a research isn't readed, you have a division by 0 -> error
now if a research isn't readed, i set the numberReads to 100 so the equation look like :
$result = NumberPublications * 100 / 100
i don't know if the calcul is right but i don't have the exception anymore :)