Decimal fractions

A decimal fraction is a rational number that can be written as $\frac{a}{10^n}$, where $a$ is an integer and $n$ is a non-negative integer. Every decimal fraction can be represented as a terminating decimal.

Important properties

• Decimal fractions have denominators that are powers of ten.

• They can always be written as terminating decimals.

• Any terminating decimal can be written as a decimal fraction.

• Decimal fractions are a subset of rational numbers.