Merge pull request #1 from piurafunk/master

Correct 'decimal_avg' helper function to average results.

Author: rtheunissen

src/helpers.php

@@ -43,6 +43,6 @@ function decimal_sum($values, int $precision = Decimal::DEFAULT_PRECISION): Deci
      */
     function decimal_avg($values, int $precision = Decimal::DEFAULT_PRECISION): Decimal
     {
-        return Decimal::sum($values, $precision);
+        return Decimal::avg($values, $precision);
     }
 }