Question

the sum of rational number is -1/3 if one number is -13/3 find the other number​

Answer 1

12/3 is the answer.

let the other rational number be r.

$- \frac{13}{3} + r = - \frac{1}{3} \\ r = - \frac{1}{3} + \frac{13}{3} = \frac{12}{3}$

hence, the other rational number is 12/3.