Decimal numbers that may be expressed as a fraction, the denominator of which is a power of ten. For example, the numerals formula_5 represent the fractions , , . More generally, a decimal with digits after the separator represents the fraction with denominator , whose numerator is the integer obtained by removing the separator. Expressed as a fully reduced fraction, the decimal numbers are those, whose denominator is a product of a power of 2 by a power of 5. Thus the smallest denominators of decimal numbers are The "integer part", or "integral part" of a decimal is the integer written
Decimal separator an Arabic decimal separator () (in hex U+066B) in Unicode. An Arabic thousands separator () also exists. In Persian, the decimal separator is called "momayyez", which is written like a forward slash—there is a small difference between the "upside-down (Persian) comma" character used in sentences and the "Latin" comma () (in hex U+066B) used to separate sequences of three digits. To separate sequences of three digits, a Latin comma or blank space may be used; however this is not a standard. In English Braille, the decimal point, , is distinct from both the comma, , and the full stop, .