diff --git a/app/models/tag/parse_methods.rb b/app/models/tag/parse_methods.rb
index 8eafa399..19d0eb3d 100644
--- a/app/models/tag/parse_methods.rb
+++ b/app/models/tag/parse_methods.rb
@@ -21,7 +21,7 @@ module Tag::ParseMethods
           nil
         end
       when :rational
-        Rational(x.tr(":", "/")).to_f.round(3) rescue 0
+        x.tr(":", "/").to_r.to_f.round(3) rescue 0
       end
     end