diff --git a/src/Utils/LocaleHelper.php b/src/Utils/LocaleHelper.php
index 25184e17..be667c12 100644
--- a/src/Utils/LocaleHelper.php
+++ b/src/Utils/LocaleHelper.php
@@ -46,7 +46,12 @@ final class LocaleHelper
      */
     public function durationDecimal(int $seconds)
     {
-        return $this->getNumberFormatter()->format(number_format($seconds / 3600, 2));
+        $value = round($seconds / 3600, 2);
+        if ($value <= 0) {
+            $value = 0;
+        }
+
+        return $this->getNumberFormatter()->format($value);
     }
 
     /**
diff --git a/tests/Utils/LocaleHelperTest.php b/tests/Utils/LocaleHelperTest.php
index bf0b1f0c..262e7756 100644
--- a/tests/Utils/LocaleHelperTest.php
+++ b/tests/Utils/LocaleHelperTest.php
@@ -198,6 +198,11 @@ class LocaleHelperTest extends TestCase
         // test extended format
         $sut = $this->getSut('de');
         $this->assertEquals('2,62', $sut->durationDecimal($record->getDuration()));
+        $this->assertEquals('6.328,89', $sut->durationDecimal(22784012));
+        $this->assertEquals('1', $sut->durationDecimal(3600));
+        $this->assertEquals('1,01', $sut->durationDecimal(3630));
+        $this->assertEquals('1,02', $sut->durationDecimal(3661));
+        $this->assertEquals('1,1', $sut->durationDecimal(3960));
 
         // test negative duration
         $sut = $this->getSut('en');
@@ -206,6 +211,7 @@ class LocaleHelperTest extends TestCase
         // test zero duration
         $sut = $this->getSut('en');
         $this->assertEquals('0', $sut->durationDecimal(0));
+        $this->assertEquals('6,328.89', $sut->durationDecimal(22784012));
     }
 
     protected function getTimesheet($seconds)