A critically damped single degree of freedom spring-mass-damper system used in a door closing mechanism becomes overdamped due to softening of the spring with extended use. If the new damping ratio (ζnew) for overdamped condition is 1.2, the ratio of the original spring stiffness to the new spring stiffness (korg/knew), assuming that the other parameters remain unchanged, is _______ (round off to two decimal places).