diff --git a/src/main/java/src/TasksFrame.java b/src/main/java/src/TasksFrame.java
index e9973d0..2170fda 100644
--- a/src/main/java/src/TasksFrame.java
+++ b/src/main/java/src/TasksFrame.java
@@ -79,6 +79,12 @@ public class TasksFrame extends JFrame {
 
     }
 
+    public int calcMod(int n, int x)
+    {
+        int rest = n % x;
+        return rest;
+    }
+
     private void setupEulerschePhiFunk() {
 
         JPanel jPanel = setupPanel("Eulersche Phi Funktion");
diff --git a/src/test/java/src/TasksFrameTest.java b/src/test/java/src/TasksFrameTest.java
index d31ce6b..00e5c38 100644
--- a/src/test/java/src/TasksFrameTest.java
+++ b/src/test/java/src/TasksFrameTest.java
@@ -91,6 +91,18 @@ class TasksFrameTest {
 
     }
 
+    @Test
+    void setupMod()
+    {
+        TasksFrame tasksFrame = new TasksFrame();
+        int p1= tasksFrame.calcMod(5,3);
+        assertEquals(2,p1);
+        int p2 = tasksFrame.calcMod(4,2);
+        assertEquals(0,p2);
+        int p3= tasksFrame.calcMod(10,3);
+        assertEquals(1,p3);
+    }
+
     }