a) 

$2222\frac{11}{117}:4444\frac{22}{117}=\frac{1}{2}$

b)

$133\frac{5}{222}:399\frac{15}{222}=\frac{1}{3}$

c)

$222\frac{4}{17}:333\frac{6}{17}=\frac{2}{3}$

d)

$4\frac{231}{100}:12\frac{693}{1000}=\frac{1}{3}$