write additive inverse of 2/3 and show that their sum is zero
 

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Please find below the solution to the asked query:

$$\begin{gathered} \mathrm{Addititve} \mathrm{inverse} \mathrm{of} \frac{2}{3}=-\frac{2}{3} \\ \left(\frac{2}{3}\right)+\left(-\frac{2}{3}\right)=0 \end{gathered}$$

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