fix small bug in plural rules
diff --git a/lib/src/plural_rules.dart b/lib/src/plural_rules.dart
index 0e8d469..610dfdf 100644
--- a/lib/src/plural_rules.dart
+++ b/lib/src/plural_rules.dart
@@ -36,7 +36,7 @@
   _precision = precision;
   _i = _n.round();
   _updateVF(_n);
-  _updateWT(_f, _v);
+  _updateWT(_v, _f);
 }
 
 /// The number whose [PluralCase] we are trying to find.