To perform the calculation, we first need to clarify the expression. It seems you are trying to subtract two fractions:
\[ \frac{-15}{7} - \frac{7}{10} \]
To subtract these fractions, we need a common denominator:
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Finding a Common Denominator: The denominators are 7 and 10. The least common multiple (LCM) of 7 and 10 is 70.
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Convert each fraction:
- For \(\frac{-15}{7}\): \[ \frac{-15}{7} = \frac{-15 \times 10}{7 \times 10} = \frac{-150}{70} \]
- For \(\frac{7}{10}\): \[ \frac{7}{10} = \frac{7 \times 7}{10 \times 7} = \frac{49}{70} \]
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Subtract the fractions: Now we can subtract: \[ \frac{-150}{70} - \frac{49}{70} = \frac{-150 - 49}{70} = \frac{-199}{70} \]
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Final Result: The result of the subtraction is: \[ \frac{-199}{70} \]
This fraction cannot be simplified further because 199 is a prime number. So the final result is \(\frac{-199}{70}\).