Farmer's got it-
30 .5
40 .6
50 .7
60 .9
30 degrees off of runway heading is 90% HW and 50% XW.
40 degrees off or runway heading is 70% HW and 60% XW.
50 degrees off of runway heading is 60% HW and 70% XW.
60 degrees off of runway heading is 50% HW and 90% XW.
If you rememer 90/50(30 degrees), 70/60 (40 degrees), 60/70(50 degrees) and 50/90(60 degrees off of runway heading) you'll be be ahead of the power curve.