You kind of mess it up from the beginning by assuming everything is based of 5 or 10 unit fractions for the math. Do it with 2,3,4,6,8 inch standards and metric

You kind of mess it up from the beginning by assuming everything is based of 5 or 10 unit fractions for the math. Do it with 2,3,4,6,8 inch standards and metric becomes notebook and imperial becomes mental.