diff --git a/ruby/leap/leap.rb b/ruby/leap/leap.rb
index abb71e5..d353797 100644
--- a/ruby/leap/leap.rb
+++ b/ruby/leap/leap.rb
@@ -1,5 +1,6 @@
+# Year class
 class Year
   def self.leap?(year)
-    (year % 4 == 0 and (year % 400 == 0 or year % 100 != 0)) 
+    ((year % 4).zero? && ((year % 400).zero? || year % 100 != 0))
   end
 end