Rational numbers

The rational numbers ($\mathbb {Q}$) are included in the real numbers ($\mathbb {R}$), while themselves including the integers ($\mathbb {Z}$), which in turn include the natural numbers ($\mathbb {N}$)

A rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. The set of all rational numbers, also referred to as "the rationals", the field of rationals, or the field of rational numbers is usually denoted by a boldface Q (or blackboard bold $\mathbb {Q}$, Unicode U+1D410 𝐐 MATHEMATICAL BOLD CAPITAL Q, or U+211A ℚ DOUBLE-STRUCK CAPITAL Q).

Lessons

• Introduction
• Advanced Study

See Also

• Wikipedia: Rational number