diff --git a/src/calculator.py b/src/calculator.py
index 6fe859f..12f9426 100644
--- a/src/calculator.py
+++ b/src/calculator.py
@@ -25,6 +25,12 @@ def clamp_to_byte(value: int) -> int:
     return max(0, min(255, value))
 
 
+def average(values: list[int | float]) -> float:
+    if not values:
+        raise ValueError
+    return sum(values) / len(values)
+
+
 def variance(values: Sequence[float]) -> float:
     if not values:
         raise ValueError
@@ -37,5 +43,3 @@ def percentage(value: Union[int, float], total: Union[int, float]) -> float:
         raise ValueError
     return (value / total) * 100
 
-
-