The part b inspection part the measurement answers will alway end with 1/16, 1/8, 3/16 or 1/4. It will never end in 32nd's 64th's ect. Aws d1.1 only recognizes discontinuities in 1/16th increments because anything under 1/16th is not counted.
Remember that! 16th's, 8th's or 1/4th's.
Also do...