Essentially it's a one to one ratio.  Bending strong will decrease the bounce and bending weak will increase the bounce.  So for your examples, the 54-10 would go to 55-11 and the 56-10 would go to 55-09.

If you are thinking of doing this (I did) you should try both if you can and see which you like better. I ended up with the 54 bent to 55 as I liked how it reacted to the turf better than the 56 bent to 55.