(2/7+5/21)÷14/7
(8/11+3/22)÷5/11

$( frac{2}{7} + frac{5}{21} ): frac{14}{7}$
$frac{2}{7} + frac{5}{21} = frac{2*3}{7*3} + frac{5}{21} = frac{6}{21} + frac{5}{21} = frac{11}{21}$
$frac{11}{21} : frac{14}{7} = frac{11}{21}* frac{7}{14} = frac{11}{3} * frac{1}{14} = frac{1*11}{3*14} = frac{11}{42}$

$( frac{8}{11} + frac{3}{22} ): frac{5}{11}$
$frac{8}{11} + frac{3}{22} = frac{8*2}{11*2} + frac{3}{22} = frac{16}{22} + frac{3}{22} = frac{19}{22}$
$frac{19}{22} : frac{5}{11} = frac{19}{22} * frac{11}{5} = frac{19}{2} * frac{1}{5} = frac{19}{10} =1 frac{9}{10}$