I find the latter more difficult because you’re carrying numbers to different places and have to reason about the whole number. In the former you can cheat by j

I find the latter more difficult because you’re carrying numbers to different places and have to reason about the whole number. In the former you can cheat by just halving (doubling, yeah it’s a little counterintuitive) the denominator (ignoring the integer in both examples, since that’s easy in both). But I will grant you, converting between denominators makes my head hurt in the imperial system. Overall I do still think metric is easier as a whole.