Question

What should be added to $\frac{2}{9}$ to get −1?

Answer 1

Let the number that is to be added be x.
$\begin{array}{l}\frac{2}{9}+x=-1\\ =>x=-1-\frac{2}{9}\\ =>x=\frac{-9-2}{9}\\ =>x=\frac{-11}{9}\\ \text{Hence, the required number is}\frac{-11}{9}\text{.}\\ \end{array}$