Which Persian mathematician advanced decimal fractions in the 15th century?

1. The 15th century work The Key to Arithmetic treated decimal fractions systematically. 2. Its author was the Persian mathematician Jamshid al-Kashi. 3. Bonfils used decimals around 1350 without notation, Al-Uqlidisi was 10th century, and Napier was later. _Source: Wikipedia, Decimal, section History of decimal fractions_