 One ruble is divided into 100 kopeks.No kopek is currently formally subdivided, although denga (½ kopek) and polushka (½ denga, thus ¼ kopek) have previously been minted.According to one version, the word "ruble" is derived from the Russian verb рубить ("rubit"), "to cut, to chop, to hack", as a ruble was considered a cutout piece of a silver grivna.