diff --git a/dojo_plugin/pages/course.py b/dojo_plugin/pages/course.py
index 7c66f8a0f..4cb7ac02c 100644
--- a/dojo_plugin/pages/course.py
+++ b/dojo_plugin/pages/course.py
@@ -308,13 +308,25 @@ def view_all_grades(dojo):
 
     average_grade = sum(grade["overall_grade"] for grade in grades) / len(grades) if grades else 0.0
     average_letter_grade = get_letter_grade(dojo, average_grade)
+    average_grade_summary = f"{average_letter_grade} ({average_grade * 100:.2f}%)"
+    average_grade_details = []
+    cumulative_count = 0
+    for letter_grade in dojo.course["letter_grades"]:
+        count = sum(1 for grade in grades if grade["letter_grade"] == letter_grade)
+        cumulative_count += count
+        percent = f"{count / len(grades) * 100:.2f}%" if grades else "0.00%"
+        cumulative_percent = f"{cumulative_count / len(grades) * 100:.2f}%" if grades else "0.00%"
+        average_grade_details.append({
+            "Grade": letter_grade,
+            "Count": count,
+            "Percent": percent,
+            "Cumulative Percent": cumulative_percent,
+        })
     grade_statistics = {
-        "Average": f"{average_letter_grade} ({average_grade * 100:.2f}%)",
+        "Average": (average_grade_summary, average_grade_details),
     }
 
-    for letter_grade in dojo.course["letter_grades"]:
-        count = sum(1 for grade in grades if grade["letter_grade"] == letter_grade)
-        grade_statistics[letter_grade] = f"{count} ({count / len(grades) * 100:.2f}%)"
+
 
     students = {student.user_id: student.token for student in dojo.students}
 
diff --git a/dojo_theme/templates/grades_admin.html b/dojo_theme/templates/grades_admin.html
index d2274c54d..752defb24 100644
--- a/dojo_theme/templates/grades_admin.html
+++ b/dojo_theme/templates/grades_admin.html
@@ -63,10 +63,31 @@ <h1>All Grades</h1>
           {% endfor %}
         </tbody>
         <tfoot>
-          {% for statistic, value in grade_statistics.items() %}
+          {% for statistic, (summary, details) in grade_statistics.items() %}
           <tr>
             <td>{{ statistic }}</td>
-            <td>{{ value }}</td>
+            <td>
+              <details>
+                <summary>{{ summary }}</summary>
+                <table>
+                  <thead>
+                    <tr>
+                      {% for column in details[0] %}
+                      <td>{{ column }}</td>
+                    </tr>
+                  </thead>
+                  <tbody>
+                    {% for row in details %}
+                    <tr>
+                      {% for value in row.values() %}
+                      <td>{{ value }}</td>
+                      {% endfor %}
+                    </tr>
+                    {% endfor %}
+                  </tbody>
+                </table>
+              </details>
+            </td>
           </tr>
           {% endfor %}
         </tfoot>