Question

6 + 7/8 : 21/4 − 5/3

Answer 1

6 + 7/7 ÷ 21/4 - 5/3 =

6 + 7/8 * 4/21 - 5/3 =

6 + 1/6 - 5/3 =

36 + 1/6 - 10 = 27/6

Answer 2

$\frac{6}{1} + \frac{7}{8} \div \frac{21}{4} - \frac{5}{3} = \\ \\ \frac{6}{1} + \frac{7}{8}. \frac{4}{21} - \frac{5}{3} = \\ \\ \frac{6}{1} + \frac{28}{168} - \frac{5}{3} = mmc = 168 \\ \\ \frac{6.168 + 28 - 56 \times 5}{168} = \\ \\ \frac{1008 + 28 - 280}{168} = \\ \\ \frac{756}{168} = \frac{378}{84} = \frac{189}{42} = \frac{63}{14}$