diff --git a/view.php b/view.php
index 88b8b39..ccb9551 100644
--- a/view.php
+++ b/view.php
@@ -98,7 +98,7 @@
     echo $OUTPUT->render_from_template('mod_subcourse/subcourseinfo', [
         'haspercentage' => ($percentage !== null),
         'hasstrgrade' => ($strgrade !== null),
-        'percentage' => floor($percentage),
+        'percentage' => floor((float)$percentage),
         'strgrade' => $strgrade,
     ]);