$4\frac{1}{30} - 3\frac{1}{20} = 4\frac{2}{60} - 3\frac{3}{60} = 3\frac{62}{60} - 3\frac{3}{60} = \frac{59}{60}$

$14\frac{1}{12} - 1\frac{1}{18} = 14\frac{3}{36} - 1\frac{2}{36} = 13\frac{1}{36}$

$3\frac{9}{25} - 1\frac{7}{10} = 3\frac{18}{50} - 1\frac{35}{50} = 2\frac{68}{50} - 1\frac{35}{50} = 1\frac{33}{50}$

$13\frac{1}{24} - 1\frac{11}{18} = 13\frac{3}{72} - 1\frac{44}{72} = 12\frac{75}{72} - 1\frac{44}{72} = 11\frac{31}{72}$

$13\frac{1}{18} - 10\frac{1}{12} = 13\frac{2}{36} - 10\frac{3}{36} = 12\frac{38}{36} - 10\frac{3}{36} = 2\frac{35}{36}$

$16\frac{2}{25} - 12\frac{2}{15} = 16\frac{6}{75} - 12\frac{10}{75} = 15\frac{81}{75} - 12\frac{10}{75} = 3\frac{71}{75}$