diff --git a/scss/mixins/_grid.scss b/scss/mixins/_grid.scss
index f398cd42ae..ff6941c464 100644
--- a/scss/mixins/_grid.scss
+++ b/scss/mixins/_grid.scss
@@ -29,7 +29,7 @@
 @mixin make-col($size: false, $columns: $grid-columns) {
   @if $size {
     flex: 0 0 auto;
-    width: divide(100%, divide($columns, $size));
+    width: percentage(divide($size, $columns));
 
   } @else {
     flex: 1 1 0;
@@ -43,7 +43,7 @@
 }
 
 @mixin make-col-offset($size, $columns: $grid-columns) {
-  $num: $size / $columns;
+  $num: divide($size, $columns);
   margin-left: if($num == 0, 0, percentage($num));
 }