It began the occasional subsidies called "tenths and fifteenths" from all people on incomes from movables: one-tenth from boroughs and royal demesne land, and one-fifteenth elsewhere.
"Our Legal Heritage, 4th Ed."
S. A. Reilly
Parliament, although it did not grant the whole amount demanded, yet granted a very considerable sum: it agreed to pay three full subsidies and three fifteenths within a year, if the negotiations were broken off.
"A History of England Principally in the Seventeenth Century, Volume I (of 6)"
Leopold von Ranke
A ching-chang is worth exactly twopence and four-fifteenths of a ching-chang.
"Amusements in Mathematics"
Henry Ernest Dudeney