```ruby
class TurnOutOfIntoFloat < ActiveRecord::Migration
  def self.up
    remove_column :grade_entry_items, :out_of
    add_column :grade_entry_items, :out_of, :float
  end

  def self.down
    remove_column :grade_entry_items, :out_of
    add_column :grade_entry_items, :out_of, :string
  end
end
```

Change the class name to TurnOutofIntoFloat
user
```ruby
class TurnOutofIntoFloat < ActiveRecord::Migration
  def self.up
    remove_column :grade_entry_items, :out_of
    add_column :grade_entry_items, :out_of, :float
  end

  def self.down
    remove_column :grade_entry_items, :out_of
    add_column :grade_entry_items, :out_of, :string
  end
end
```
assistant