1 files changed, 7 insertions, 5 deletions
diff --git a/activemodel/lib/active_model/type/helpers/time_value.rb b/activemodel/lib/active_model/type/helpers/time_value.rb
index d8c5d929a3..250c4021c6 100644
--- a/activemodel/lib/active_model/type/helpers/time_value.rb
+++ b/activemodel/lib/active_model/type/helpers/time_value.rb
@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 require "active_support/core_ext/time/zones"
 
 module ActiveModel
   module Type
-    module Helpers
-      module TimeValue # :nodoc:
+    module Helpers # :nodoc: all
+      module TimeValue
         def serialize(value)
           value = apply_seconds_precision(value)
 
@@ -33,12 +35,12 @@ module ActiveModel
         def apply_seconds_precision(value)
           return value unless precision && value.respond_to?(:usec)
           number_of_insignificant_digits = 6 - precision
-          round_power = 10 ** number_of_insignificant_digits
-          value.change(usec: value.usec / round_power * round_power)
+          round_power = 10**number_of_insignificant_digits
+          value.change(usec: value.usec - value.usec % round_power)
         end
 
         def type_cast_for_schema(value)
-          "'#{value.to_s(:db)}'"
+          value.to_s(:db).inspect
         end
 
         def user_input_in_time_zone(value)