The runways are labelled rounded to the next 10deg so if a runway is 154.9 and the magnetic pole moves 0.2 deg you go from runway 15L to runway 16L Alternately

The runways are labelled rounded to the next 10deg so if a runway is 154.9 and the magnetic pole moves 0.2 deg you go from runway 15L to runway 16L Alternately you could move the runway a bit