diff --git a/IRaCIS.Core.Application/Service/ReadingCalculate/PCWG3CalculateService.cs b/IRaCIS.Core.Application/Service/ReadingCalculate/PCWG3CalculateService.cs
index 6e3173e4e..5a690350f 100644
--- a/IRaCIS.Core.Application/Service/ReadingCalculate/PCWG3CalculateService.cs
+++ b/IRaCIS.Core.Application/Service/ReadingCalculate/PCWG3CalculateService.cs
@@ -558,7 +558,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
 
                             if (valueOfTypes.Contains(item.ValueType))
                             {
-                                item.Answer = decimal.Round(decimal.Parse(item.Answer ?? "0"), inDto.DigitPlaces).ToString();
+                                item.Answer = decimal.Round(decimal.Parse(item.Answer.IsNullOrEmpty() ? "0": item.Answer), inDto.DigitPlaces).ToString();
                             }
                         }
                         catch (Exception)