Negative of a Rational Number

If a and b are two rational numbers such that a + b = b + a = 0 then b is called the additive inverse or the negative of a.

Example :
Therefore   is the additive inverse or negative of , and  is the additive inverse or negative of .

The additive inverse of the rational number
p is denoted by  p.
Therefore, the negative of  is denoted as .