Validation for non-negative integers and decimal values

Question

My fields are: tax rate and tax amount in which I want to validate positive values.

I wrote this validation:

:format => { :w         


        

Answer 1

Doesn't this work?

validates :your_field, :numericality => { :greater_than_or_equal_to => 0 }

(guess for taxes following rule will be more correct:)

validates :your_field, :numericality => { :greater_than_or_equal_to => 0, :less_than_or_equal_to => 100 }