diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DecimalUpDown.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DecimalUpDown.cs
index 352f209d..13c4aa9b 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DecimalUpDown.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DecimalUpDown.cs
@@ -55,7 +55,7 @@ namespace Microsoft.Windows.Controls
 
             try
             {
-                result = Decimal.Parse(text, System.Globalization.NumberStyles.Any, CultureInfo);
+                result = FormatString.Contains("P") ? ParsePercent(text, CultureInfo) : ParseDecimal(text, CultureInfo);
             }
             catch
             {
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DoubleUpDown.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DoubleUpDown.cs
index ccb38584..acf85de9 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DoubleUpDown.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/DoubleUpDown.cs
@@ -55,7 +55,7 @@ namespace Microsoft.Windows.Controls
 
             try
             {
-                result = Double.Parse(text, System.Globalization.NumberStyles.Any, CultureInfo);
+                result = FormatString.Contains("P") ? Decimal.ToDouble(ParsePercent(text, CultureInfo)) : ParseDouble(text, CultureInfo);
             }
             catch
             {
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/IntegerUpDown.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/IntegerUpDown.cs
index 5d61361d..1362a52d 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/IntegerUpDown.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/IntegerUpDown.cs
@@ -55,7 +55,8 @@ namespace Microsoft.Windows.Controls
 
             try
             {
-                result = Int32.Parse(text, System.Globalization.NumberStyles.Any, CultureInfo);
+                //don't know why someone would format an integer as %, but just in case they do.
+                result = FormatString.Contains("P") ? Decimal.ToInt32(ParsePercent(text, CultureInfo)) : ParseInt(text, CultureInfo);
             }
             catch
             {
diff --git a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/NumericUpDown.cs b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/NumericUpDown.cs
index ef8274ec..667f3a12 100644
--- a/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/NumericUpDown.cs
+++ b/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/NumericUpDown/Implementation/NumericUpDown.cs
@@ -2,6 +2,7 @@
 using System.Windows;
 using System.Windows.Input;
 using Microsoft.Windows.Controls.Primitives;
+using System.Globalization;
 
 namespace Microsoft.Windows.Controls
 {
@@ -156,6 +157,34 @@ namespace Microsoft.Windows.Controls
         //        Spinner.ValidSpinDirection = validDirections;
         //}
 
+
+        protected static decimal ParseDecimal(string text, IFormatProvider cultureInfo)
+        {
+            return Decimal.Parse(text, NumberStyles.Any, cultureInfo);
+        }
+
+        protected static double ParseDouble(string text, IFormatProvider cultureInfo)
+        {
+            return Double.Parse(text, NumberStyles.Any, cultureInfo);
+        }
+
+        protected static int ParseInt(string text, IFormatProvider cultureInfo)
+        {
+            return Int32.Parse(text, NumberStyles.Any, cultureInfo);
+        }
+
+        protected static decimal ParsePercent(string text, IFormatProvider cultureInfo)
+        {
+            NumberFormatInfo info = NumberFormatInfo.GetInstance(cultureInfo);
+
+            text = text.Replace(info.PercentSymbol, null);
+
+            decimal result = Decimal.Parse(text, NumberStyles.Any, info);
+            result = result / 100;
+
+            return result;
+        }
+
         #endregion //Methods
     }
 }