diff --git a/src/multiplication.c b/src/multiplication.c
index 037d396..d5eff30 100644
--- a/src/multiplication.c
+++ b/src/multiplication.c
@@ -21,9 +21,7 @@ int multi_left_shift(int a, int b) {
 int multi_right_shift(int a, int b) {
     return a >> b;
 }
-int multi_by_five(int a) {
-    return a * 5;
-}
+
 
 float multi_by_percentage(float num, float percentage) {
     return num * (percentage / 100);
diff --git a/src/multiplication.h b/src/multiplication.h
index a607f71..713e205 100644
--- a/src/multiplication.h
+++ b/src/multiplication.h
@@ -5,7 +5,7 @@ extern double multi(double num1, double num2);
 int multi_three_integers(int a, int b, int c);
 int multi_left_shift(int a, int b);
 int multi_right_shift(int a, int b);
-int multi_by_five(int a);
+
 float multi_by_percentage(float num, float percentage);
 int multi_by_random(int num);
 int multi_string(const char* str, int factor);