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Question
Multiply:
\[\frac{- 11}{13} \text{by} \frac{- 21}{7}\]
Sum
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Solution
\[\frac{- 11}{13} \times \frac{- 21}{7} = \frac{( - 11) \times ( - 21)}{13 \times 7} = \frac{231}{91} = \frac{33}{13}\]
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