In fact, it would be nice to memorize all fractions of 16: 1/16=0.0625 2/16=1/8=0.125 3/16=0.1875 4/16=1/4=0.25 5/16=0.5625 6/16=3/8=0.375 7/16=0.4375 8/16=1/2=0.5 9/16=0.5625 10/16=5/8=0.625 11/16=0.6875 12/16=3/4=0.75 13/16=0.8125 14/16=7/8=0.875 15/16=0.9375
This would be useful for any still living in the Imperial system, with lb/oz, fractions of an inch, etc.