diff --git a/cms/djangoapps/contentstore/tests/test_course_settings.py b/cms/djangoapps/contentstore/tests/test_course_settings.py
index a72d14e931f7..44c5891a85bd 100644
--- a/cms/djangoapps/contentstore/tests/test_course_settings.py
+++ b/cms/djangoapps/contentstore/tests/test_course_settings.py
@@ -499,7 +499,11 @@ def test_entrance_exam_created_updated_and_deleted_successfully(self):
         course = modulestore().get_course(self.course.id)
         self.assertEqual(response.status_code, 200)
         self.assertFalse(course.entrance_exam_enabled)
-        self.assertEqual(course.entrance_exam_minimum_score_pct, None)
+        entrance_exam_minimum_score_pct = float(settings.ENTRANCE_EXAM_MIN_SCORE_PCT)
+        if entrance_exam_minimum_score_pct.is_integer():
+            entrance_exam_minimum_score_pct = entrance_exam_minimum_score_pct / 100
+
+        self.assertEqual(course.entrance_exam_minimum_score_pct, entrance_exam_minimum_score_pct)
 
         self.assertFalse(milestones_helpers.any_unfulfilled_milestones(self.course.id, self.user.id),
                          msg='The entrance exam should not be required anymore')
diff --git a/cms/djangoapps/contentstore/views/entrance_exam.py b/cms/djangoapps/contentstore/views/entrance_exam.py
index bbefb0e9e876..5d914366bd9e 100644
--- a/cms/djangoapps/contentstore/views/entrance_exam.py
+++ b/cms/djangoapps/contentstore/views/entrance_exam.py
@@ -224,7 +224,7 @@ def _delete_entrance_exam(request, course_key):
     if course.entrance_exam_id:
         metadata = {
             'entrance_exam_enabled': False,
-            'entrance_exam_minimum_score_pct': None,
+            'entrance_exam_minimum_score_pct': _get_default_entrance_exam_minimum_pct(),
             'entrance_exam_id': None,
         }
         CourseMetadata.update_from_dict(metadata, course, request.user)
diff --git a/openedx/core/djangoapps/content/course_overviews/models.py b/openedx/core/djangoapps/content/course_overviews/models.py
index 10a56f0868fb..c7264fd9d94b 100644
--- a/openedx/core/djangoapps/content/course_overviews/models.py
+++ b/openedx/core/djangoapps/content/course_overviews/models.py
@@ -266,10 +266,20 @@ def _create_or_update(cls, course):  # lint-amnesty, pylint: disable=too-many-st
         course_overview.entrance_exam_id = course.entrance_exam_id or ''
         # Despite it being a float, the course object defaults to an int. So we will detect that case and update
         # it to be a float like everything else.
-        if isinstance(course.entrance_exam_minimum_score_pct, int):
-            course_overview.entrance_exam_minimum_score_pct = course.entrance_exam_minimum_score_pct / 100
+        # Extra handling: entrance_exam_minimum_score_pct can be None (e.g. when exams are disabled in Studio),
+        # so we fall back to settings.ENTRANCE_EXAM_MIN_SCORE_PCT to prevent CourseOverview save failures.
+        if course.entrance_exam_minimum_score_pct is None:
+            entrance_exam_minimum_score_pct = float(settings.ENTRANCE_EXAM_MIN_SCORE_PCT)
         else:
-            course_overview.entrance_exam_minimum_score_pct = course.entrance_exam_minimum_score_pct
+            entrance_exam_minimum_score_pct = course.entrance_exam_minimum_score_pct
+
+        if (
+            isinstance(entrance_exam_minimum_score_pct, int)
+            or (isinstance(entrance_exam_minimum_score_pct, float) and entrance_exam_minimum_score_pct.is_integer())
+        ):
+            entrance_exam_minimum_score_pct = entrance_exam_minimum_score_pct / 100
+
+        course_overview.entrance_exam_minimum_score_pct = entrance_exam_minimum_score_pct
 
         course_overview.force_on_flexible_peer_openassessments = course.force_on_flexible_peer_openassessments