Metric vs. other measurement systems - chart

[mklotz]

Unfortunately the print is difficult to read. The schoolmaster asks Tertius what 4% of £5 would be. Tertius’s second guess is the nearest.

Once one learns the definitions of £/s/d, it's straightforward, even for a metriphile Usonian...

£5 = 100 s(hillings) so 4% is 4 shillings, or 48 d, or 192 farthings