Question

8 18/21+(5 8/21-3 2/21)

Answer 1

$8\frac{18}{21} + (5\frac{8}{21} - 3\frac{2}{21})= 8\frac{18}{21} + 2\frac{6}{21} = 10\frac{24}{21} = 11\frac{3}{21} = 11\frac{1}{7}$