seratus

Seratus is the Indonesian and Malay word for the number 100. It is formed with the prefix se- attached to ratus (hundred), where se- expresses a single unit or the totality of the numeral. In usage, seratus can function as a standalone numeral or as the leading element in larger numbers, for example seratus satu (101) or seratus dua puluh lima (125). It is also used in fixed phrases such as seratus persen (one hundred percent) or seratus rupiah (one hundred rupiah).

In Indonesian and Malay counting, numbers above one hundred are typically built by combining numerals with ratus for hundreds, such as dua ratus for 200, or by using the se- construction for 100 and continuing with additional digits. The form seratus remains the standard expression for 100 in both formal and informal contexts. The word ratus is common across Malayic languages and is generally considered to have ancient linguistic roots that may trace back through long-standing language contact in the region, with some accounts linking it to older Indo-European or Sanskrit-derived terms for "hundred."

In numeral notation, 100 is written as 100 in Arabic numerals and as C in Roman numerals. The usage of seratus extends to monetary amounts and quantities in everyday life, commerce, and accounting, where precise numbers and rounding are routine.

See also: seribu, satuan, angka.