Chapter 1 - Introduction to Algebraic Expressions - 1.7 Multiplication and Division of Real Numbers - 1.7 Exercise Set - Page 58: 107

$\dfrac{3}{11}$

The given expression, $ \left( -\dfrac{3}{11} \right)-\left( -\dfrac{6}{11} \right) $, simplifies to \begin{array}{l}\require{cancel} -\dfrac{3}{11}+\dfrac{6}{11} \\\\= \dfrac{-3+6}{11} \\\\= \dfrac{3}{11} .\end{array}