diff --git a/admin-dev/themes/default/template/controllers/groups/helpers/form/form.tpl b/admin-dev/themes/default/template/controllers/groups/helpers/form/form.tpl
index 242ea2e22..d73c9cc69 100644
--- a/admin-dev/themes/default/template/controllers/groups/helpers/form/form.tpl
+++ b/admin-dev/themes/default/template/controllers/groups/helpers/form/form.tpl
@@ -138,7 +138,7 @@
 					}
 					else
 					{
-						$('#group_discount_category_table').append('<tr class="alt_row" id="'+jsonData.id_category+'"><td>'+jsonData.catPath+'</td><td>{l s='Discount:'}'+jsonData.discount+'{l s='%'}</td><td><a href="#" onclick="deleteCategoryReduction('+jsonData.id_category+');"><img src="../img/admin/delete.gif"></a></td></tr>');
+						$('#group_discount_category_table').append('<tr class="alt_row" id="'+jsonData.id_category+'"><td>'+jsonData.catPath+'</td><td>{l s='Discount:'}' + ' ' + jsonData.discount+'{l s='%'}</td><td><a href="#" onclick="deleteCategoryReduction('+jsonData.id_category+');"><img src="../img/admin/delete.gif"></a></td></tr>');
 						
 						var input_hidden = document.createElement("input");
 						input_hidden.setAttribute('type', 'hidden');
@@ -168,7 +168,7 @@
 				{foreach $input['values'] key=key item=category }
 					<tr class="alt_row" id="{$category.id_category}">
 						<td>{$category.path}</td>
-						<td>{l s='Discount: %d%%' sprintf=$category.reduction}</td>
+						<td>{l s='Discount: %.2f%%' sprintf=$category.reduction}</td>
 						<td>
 							<a href="#" onclick="deleteCategoryReduction({$category.id_category});"><img src="../img/admin/delete.gif"></a>
 							<input type="hidden" class="category_reduction" name="category_reduction[{$category.id_category}]" value="{$category.reduction}">
diff --git a/admin-dev/themes/default/template/controllers/groups/helpers/view/view.tpl b/admin-dev/themes/default/template/controllers/groups/helpers/view/view.tpl
index 96908c212..6762c700c 100755
--- a/admin-dev/themes/default/template/controllers/groups/helpers/view/view.tpl
+++ b/admin-dev/themes/default/template/controllers/groups/helpers/view/view.tpl
@@ -30,7 +30,7 @@
 	<fieldset>
 		<ul>
 			<li><span style="font-weight: bold; font-size: 13px; color:#000;">{l s='Name:'}</span> {$group->name[$language->id]}</li>
-		<li><span style="font-weight: bold; font-size: 13px; color:#000;">{l s='Discount: %d%%' sprintf=$group->reduction}</span></li>
+		<li><span style="font-weight: bold; font-size: 13px; color:#000;">{l s='Discount: %.2f%%' sprintf=$group->reduction}</span></li>
 		<li><span style="font-weight: bold; font-size: 13px; color:#000;">{l s='Current category discount:'}</span>
 			{if !$categorieReductions}
 				{l s='None'}
@@ -39,7 +39,7 @@
 					{foreach $categorieReductions key=key item=category }
 						<tr class="alt_row">
 							<td>{$category.path}</td>
-							<td>{l s='Discount: %d%%' sprintf=$category.reduction}</td>
+							<td>{l s='Discount: %.2f%%' sprintf=$category.reduction}</td>
 						</tr>
 					{/foreach}
 				</table>
diff --git a/install-dev/upgrade/sql/1.5.6.1.sql b/install-dev/upgrade/sql/1.5.6.1.sql
index 91d0f9c05..992629875 100644
--- a/install-dev/upgrade/sql/1.5.6.1.sql
+++ b/install-dev/upgrade/sql/1.5.6.1.sql
@@ -8,4 +8,6 @@ UPDATE `PREFIX_orders` SET conversion_rate = 1 WHERE conversion_rate = 0;
 
 ALTER TABLE `PREFIX_cms` ADD `indexation` tinyint(1) UNSIGNED NULL DEFAULT '1' AFTER `active`;
 
-/* PHP:update_order_messages(); */;
\ No newline at end of file
+/* PHP:update_order_messages(); */;
+
+ALTER TABLE `REFIX_group_reduction` CHANGE `reduction` `reduction` DECIMAL( 4, 4 ) NOT NULL;
\ No newline at end of file