Degrees off the nose, divide it by sixty and then its that fraction of the wind strength.
10 degrees = 1/6
20 degrees = 2/6 = 1/3 etc...
Easy enough to do mentally when you recieve the wind strength on final, and the clock code method as described above can be even simpler depending on personal preference.
These methods will also work for headwind/tailwind components if you calculate degrees off abeam.