A terminating decimal is a decimal expansion whose digits are eventually all zero after the decimal point. For example, 
terminates, whereas 
does not. A rational
number 
in lowest terms has a terminating decimal expansion iff the
prime factors of 
are only 2 and 5.
Terminating Decimal
See also
Decimal Expansion, Rational Number, Repeating DecimalExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Terminating Decimal." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/TerminatingDecimal.html