Question

simplify 2/3 + (-6/7) + 4/15 - (- 1/21)​

Answer 1

Answer:

$\frac{2}{3} + ( - \frac{6}{7} ) + \frac{4}{15} - ( - \frac{1}{21} ) \\ \\ = \frac{2}{3} - \frac{6}{7} + \frac{4}{15} + \frac{1}{21} \\ \\ = \frac{2}{3} + \frac{4}{15} + \frac{1}{21} - \frac{6}{7} \\ \\ = \frac{10 + 4}{15} + \frac{1 - 18}{21} \\ \\ = \frac{14}{15} - \frac{17}{21} \\ \\ \\ = \frac{98 - 85}{105} \\ \\ = \frac{13}{105 } \: \: \: ya \: \: 8.07$

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