For much of the 20th century, £sd was the monetary system of most of the Commonwealth countries, the major exceptions being Canada and India
The british pound divided in 20 shillings and a shilling divided in 12 pence, or 240 pence in a pound.
I remember in schooll making that conversions. Was a nightmare.

English only "discovered " decimal system on XX century- pouns, feets, acres, inches, gallon,