diff --git a/src/col/styles.js b/src/col/styles.js
index df0454e..fdf3551 100644
--- a/src/col/styles.js
+++ b/src/col/styles.js
@@ -8,12 +8,20 @@ const styles = {
     flex: '0 0 auto',
     paddingRight: gutter / 2,
     paddingLeft: gutter / 2,
+
+    '&:first-of-type': {
+      paddingLeft: 0,
+    },
+
+    '&:last-of-type': {
+      paddingRight: 0,
+    },
   },
   reverse: {
     'flex-direction': 'column-reverse',
   },
 };
-const _size = i => Number(100 / columns * i).toFixed(4);
+const _size = i => Number((100 / columns) * i).toFixed(4);
 
 const helpers = {
   basic: {