From b0a675ab1406513d99a6ace09dde992815f4513a Mon Sep 17 00:00:00 2001
From: Natalie Weizenbaum <nex342@gmail.com>
Date: Wed, 21 Sep 2016 16:32:27 -0700
Subject: [PATCH] Add percentage().

---
 lib/src/functions.dart | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/src/functions.dart b/lib/src/functions.dart
index dd74f541..f323e106 100644
--- a/lib/src/functions.dart
+++ b/lib/src/functions.dart
@@ -479,6 +479,15 @@ void defineCoreFunctions(Environment environment) {
     return new SassString(string.text.toLowerCase(), quotes: string.hasQuotes);
   }));
 
+  // ## Number
+
+  environment
+      .setFunction(new BuiltInCallable("percentage", r"$number", (arguments) {
+    var number = arguments[0].assertNumber("number");
+    number.assertNoUnits();
+    return new SassNumber(number.value * 100, '%');
+  }));
+
   // ## Introspection
 
   environment.setFunction(new BuiltInCallable("inspect", r"$value",