Comment by georgefrowny

There is no such decipence division in the UK, but fuel is still sold with a vestigial .9 pence on the end. In fact, since the denomination is per litre, not gallon, the .9 is about 4 times more significant.

When the final calculation of XX.YYY litres * AAA.9 pence/litre is done, it's then rounded off to 1 pence.

Currency conversions are also frequently done with readers that aren't a round multiple of pence, even in official government tables: https://www.trade-tariff.service.gov.uk/exchange_rates/view/...