diff --git a/src/ImageProcessorCore/Numerics/LongRational.cs b/src/ImageProcessorCore/Numerics/LongRational.cs
index 8826ce7fd7..d2b0417eed 100644
--- a/src/ImageProcessorCore/Numerics/LongRational.cs
+++ b/src/ImageProcessorCore/Numerics/LongRational.cs
@@ -273,7 +273,7 @@ namespace ImageProcessorCore
             StringBuilder sb = new StringBuilder();
             sb.Append(this.Numerator.ToString(provider));
             sb.Append("/");
-            sb.Append(this.Denominator.ToString("R", provider));
+            sb.Append(this.Denominator.ToString(provider));
             return sb.ToString();
         }