Question
What should be added to $\frac{-5}{7}$ to get $\frac{-2}{3}?$
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Answer
The required number $=3-\Big(\frac{-12}{5}\Big)$ $=\frac{3}{1}+\frac{12}{5}=\frac{15+12}{5}$ $=\frac{27}{5}$
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