diff --git a/mod/quiz/question.php b/mod/quiz/question.php
index e10dcda761b27..b9409c0e491cd 100644
--- a/mod/quiz/question.php
+++ b/mod/quiz/question.php
@@ -234,7 +234,7 @@
         }
     } 
 
-    $grades = array(1,0.9,0.8,0.75,0.70,0.66666,0.60,0.50,0.40,0.33333,0.30,0.25,0.20,0.16666,0.10,0.05,0);
+    $grades = array(1,0.9,0.8,0.75,0.70,0.66666,0.60,0.50,0.40,0.33333,0.30,0.25,0.20,0.16666,0.142857,0.10,0.05,0);
     foreach ($grades as $grade) {
         $percentage = 100 * $grade;
         $neggrade = -$grade;