Bilangan rasional

Natural numbers ($\mathbb {Q}$, quotient = hasil bagi)

$\mathbb {Q} =\lbrace {\frac {m}{n}}:m,n\in \mathbb {Z} ,n\neq 0\rbrace$

$\mathbb {Z}$ : Bilangan bulat

Desimal

Bilangan rasional memiliki karakteristik desimal berulang.

Failed to parse (syntax error): {\displaystyle \frac{1}{9} = 0,11111... = 0,\bar{1} \\ \frac{1}{2} = 0,50000... = 0,5\bar{0} \\ \frac{3}{7} = 0,272727... = 0,\overline{27} \\ }