Arabic mathematicians extended the system to include decimal fractions, and Muḥammad ibn Mūsā al-Ḵwārizmī wrote an important work about it in the 9th century.
Ahli matematika Arab ngagengang sistem anggén ngeranjingang pecahan desimal, miwah Muhammad ibnu Mūsā al-Ḵwārizmī ngurit sastra sané mabuat indiké punika ring abad ke-9.