I am soooo glad I don’t have to work in inches anymore. At one time I had all the decimal equivalents up to 32nds in my head… As a modelmaker I worked mostly in decimal inches though, unless we were building something construction like in scale, then 1/16’s were usually more than accurate enough - something you can actually see on a tape measure.
All the space that those fraction equivalents used to take up in my head are now used for storing some of the more esoteric Rhino options… 
–Mitch