diff --git a/src/c/funktionen.h b/src/c/funktionen.h
index c4c1f27..26f686a 100644
--- a/src/c/funktionen.h
+++ b/src/c/funktionen.h
@@ -46,4 +46,6 @@ float minimum(float x, float y);
 // Function to calculate the average of two numbers
 float average(float x, float y);
 
+// Function to calculate the remainder of division between two numbers
+float remainderValue(float x, float y);
 #endif
\ No newline at end of file
diff --git a/src/test/test_funktionen.c b/src/test/test_funktionen.c
index 28788a2..db518d1 100644
--- a/src/test/test_funktionen.c
+++ b/src/test/test_funktionen.c
@@ -87,4 +87,10 @@ void test_average(void) {
     TEST_ASSERT_FLOAT_WITHIN(0.000001, 7.0, result);
 }
 
+void test_remainderValue(void) {
+    float result = remainderValue(10.5, 3.0);
+    TEST_ASSERT_FLOAT_WITHIN(0.000001, 1.5, result);
+}
+
+
 #endif
\ No newline at end of file