diff --git a/_sass/yat/_base.scss b/_sass/yat/_base.scss
index c933a8b8748..0d2365d8072 100644
--- a/_sass/yat/_base.scss
+++ b/_sass/yat/_base.scss
@@ -42,7 +42,7 @@ h1, h2, h3, h4, h5, h6,
 p, blockquote, pre,
 ul, ol, dl, figure,
 %vertical-rhythm {
-  margin-bottom: math.div($spacing-unit, 2);
+  margin-bottom: divide($spacing-unit, 2);
 }
 
 
@@ -128,7 +128,7 @@ a {
 blockquote {
   color: $grey-color;
   border-left: 4px solid $grey-color-light;
-  padding-left: math.div($spacing-unit, 2);
+  padding-left: divide($spacing-unit, 2);
   @include relative-font-size(1.125);
   letter-spacing: -1px;
   font-style: italic;
@@ -222,7 +222,7 @@ table {
   }
 
   th, td {
-    padding: math.div($spacing-unit, 3) math.div($spacing-unit, 2);
+    padding: divide($spacing-unit, 3) divide($spacing-unit, 2);
   }
 
   th {
diff --git a/_sass/yat/_layout.scss b/_sass/yat/_layout.scss
index deda26871b2..b44bb2d0670 100644
--- a/_sass/yat/_layout.scss
+++ b/_sass/yat/_layout.scss
@@ -107,7 +107,7 @@ html {
 
     .site-favicon {
       display: inline-block;
-      height: math.div($header-height, 1.5);
+      height: divide($header-height, 1.5);
       margin-right: 5px;
     }
   }
@@ -695,7 +695,7 @@ html {
   }
 
   @include media-query($on-palm) {
-    height: math.div($banner-height, 1.5);
+    height: divide($banner-height, 1.5);
   }
 }