diff --git a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/dialogs/layoutconfig.controller.js b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/dialogs/layoutconfig.controller.js
index edb7f768d1..628112903d 100644
--- a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/dialogs/layoutconfig.controller.js
+++ b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/dialogs/layoutconfig.controller.js
@@ -21,7 +21,7 @@ angular.module("umbraco")
     		};
 
     		$scope.percentage = function(spans){
-    		    return ((spans / $scope.columns) * 100).toFixed(1);
+    		    return ((spans / $scope.columns) * 100).toFixed(8);
     		};
 
     		$scope.toggleCollection = function(collection, toggle){
diff --git a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/dialogs/rowconfig.controller.js b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/dialogs/rowconfig.controller.js
index 70f9951de5..7f7b817b8a 100644
--- a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/dialogs/rowconfig.controller.js
+++ b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/dialogs/rowconfig.controller.js
@@ -19,7 +19,7 @@ function RowConfigController($scope) {
     };
 
     $scope.percentage = function(spans) {
-        return ((spans / $scope.columns) * 100).toFixed(1);
+        return ((spans / $scope.columns) * 100).toFixed(8);
     };
 
     $scope.toggleCollection = function(collection, toggle) {
diff --git a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/grid.controller.js b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/grid.controller.js
index 9428c64704..24aa722cc3 100644
--- a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/grid.controller.js
+++ b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/grid.controller.js
@@ -424,7 +424,7 @@ angular.module("umbraco")
         };
 
         $scope.percentage = function (spans) {
-            return ((spans / $scope.model.config.items.columns) * 100).toFixed(1);
+            return ((spans / $scope.model.config.items.columns) * 100).toFixed(8);
         };
 
 
diff --git a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/grid.prevalues.controller.js b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/grid.prevalues.controller.js
index 229a7992f5..bfe5d1ba2e 100644
--- a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/grid.prevalues.controller.js
+++ b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/grid/grid.prevalues.controller.js
@@ -161,7 +161,7 @@ angular.module("umbraco")
         };
 
         $scope.percentage = function(spans){
-            return ((spans / $scope.model.value.columns) * 100).toFixed(1);
+            return ((spans / $scope.model.value.columns) * 100).toFixed(8);
         };
 
         $scope.zeroWidthFilter = function (cell) {