Is this really easier for people than simply multiplying by ⅝ or ⁸⁄₅ as appropriate? And how often does one need to do this conversion anyway? I definitely don’t have any fibonacci numbers above 13 memorized.
> Is this really easier for people than simply multiplying by ⅝ or ⁸⁄₅ as appropriate?
I usually just treat miles as kilometers. When I need more precision I multiply miles by 1.5. All these 8/5 just don't stick in my mind, and 1.6 is not much better then 1.6, but it is much easier to multiply by 1.5.
> And how often does one need to do this conversion anyway?
Every time I see distance measured in miles. It may be 1 time per week, or multiple times per day.
