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
Repeating decimal some other properties of repetends, see also. Various features of repeating decimals extend to the representation of numbers in all other integer bases, not just base 10: For example, in duodecimal, 1/2 = 0.6, 1/3 = 0.4, 1/4 = 0.3 and 1/6 = 0.2 all terminate; 1/5 = 0.2497 repeats with period 4, in contrast with the equivalent decimal expansion of 0.2; 1/7 = 0.186ᘔ35 has period 6 in duodecimal, just as it does in decimal. If "b" is an integer base and "k" is an integer, For example 1/7 in duodecimal: Which is 0.186ᘔ35 (base 12). Note that 10