9. \( \frac{10}{11}-\frac{2}{3}= \)
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To subtract the fractions \( \frac{10}{11} \) and \( \frac{2}{3} \), you need a common denominator. The least common multiple of 11 and 3 is 33. Convert \( \frac{10}{11} \) to have a denominator of 33 by multiplying both the numerator and denominator by 3: \[ \frac{10}{11} = \frac{30}{33} \] Now convert \( \frac{2}{3} \) to have a denominator of 33 by multiplying both the numerator and denominator by 11: \[ \frac{2}{3} = \frac{22}{33} \] Now you can subtract: \[ \frac{30}{33} - \frac{22}{33} = \frac{8}{33} \] So, \( \frac{10}{11} - \frac{2}{3} = \frac{8}{33} \).