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Question

$(\frac{11}{- 15}) (\frac{- 7}{10}) + (\frac{- 3}{20}) (\frac{7}{30})$

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Solution

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$(\frac{- 11 \times - 7}{15 \times 10}) + (\frac{- 3 \times 7}{20 \times 30}) \frac{77}{150} - \frac{21}{600} \frac{308 - 21}{600} \frac{287}{600}$

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