diff --git a/composer.json b/composer.json
index 7a288f6..12aa6fb 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,8 @@
     ],
     "require": {
         "php": "^8.1",
-        "illuminate/support": "^10.0|^11.0|^12.0"
+        "illuminate/support": "^10.0|^11.0|^12.0",
+        "psr/log": "^3.0.2"
     },
     "require-dev": {
         "laravel/pint": "^1.0",
diff --git a/src/Attributes/Resources/Properties/ApiFormatting/FloatPrecision.php b/src/Attributes/Resources/Properties/ApiFormatting/FloatPrecision.php
new file mode 100644
index 0000000..eb845e8
--- /dev/null
+++ b/src/Attributes/Resources/Properties/ApiFormatting/FloatPrecision.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Morningtrain\Economic\Attributes\Resources\Properties\ApiFormatting;
+
+use Attribute;
+use Morningtrain\Economic\Interfaces\ApiFormatter;
+
+#[Attribute(Attribute::TARGET_PROPERTY)]
+class FloatPrecision implements ApiFormatter
+{
+    public function __construct(
+        protected int $precision
+    ) {}
+
+    public function format($value): mixed
+    {
+        if (! is_numeric($value)) {
+            return $value;
+        }
+
+        return round((float) $value, $this->precision);
+    }
+}
diff --git a/src/Attributes/Resources/Properties/ApiFormatting/ResourceToPrimaryKey.php b/src/Attributes/Resources/Properties/ApiFormatting/ResourceToPrimaryKey.php
index 6fd8f9c..f74ebc9 100644
--- a/src/Attributes/Resources/Properties/ApiFormatting/ResourceToPrimaryKey.php
+++ b/src/Attributes/Resources/Properties/ApiFormatting/ResourceToPrimaryKey.php
@@ -13,7 +13,7 @@ public function __construct() {}
     public function format($value): mixed
     {
         if (! is_a($value, Resource::class)) {
-            throw new \InvalidArgumentException('ResourceToArray can only be used on properties of type Resource');
+            throw new \InvalidArgumentException('ResourceToPrimaryKey can only be used on properties of type Resource');
         }
 
         return $value->getPrimaryKey();
diff --git a/src/DTOs/Invoice/ProductLine.php b/src/DTOs/Invoice/ProductLine.php
index df32c86..d142f18 100644
--- a/src/DTOs/Invoice/ProductLine.php
+++ b/src/DTOs/Invoice/ProductLine.php
@@ -3,6 +3,7 @@
 namespace Morningtrain\Economic\DTOs\Invoice;
 
 use Morningtrain\Economic\Abstracts\Resource;
+use Morningtrain\Economic\Attributes\Resources\Properties\ApiFormatting\FloatPrecision;
 use Morningtrain\Economic\Attributes\Resources\Properties\ApiFormatting\ResourceToArray;
 use Morningtrain\Economic\Resources\DepartmentalDistribution;
 use Morningtrain\Economic\Resources\Product;
@@ -16,6 +17,7 @@ class ProductLine extends Resource
 
     public ?string $description;
 
+    #[FloatPrecision(2)]
     public ?float $discountPercentage;
 
     public ?float $marginInBaseCurrency;