Сократите дроби: a) 20/118, 236/444, 66/102, 128/28; б) 108/72, 36/243, 120/168, 720/640

а) Сократим дроби: 1) $$\frac{20}{118} = \frac{20:2}{118:2} = \frac{10}{59}$$ 2) $$\frac{236}{444} = \frac{236:4}{444:4} = \frac{59}{111}$$ 3) $$\frac{66}{102} = \frac{66:6}{102:6} = \frac{11}{17}$$ 4) $$\frac{128}{28} = \frac{128:4}{28:4} = \frac{32}{7}$$ б) Сократим дроби: 1) $$\frac{108}{72} = \frac{108:36}{72:36} = \frac{3}{2}$$ 2) $$\frac{36}{243} = \frac{36:9}{243:9} = \frac{4}{27}$$ 3) $$\frac{120}{168} = \frac{120:24}{168:24} = \frac{5}{7}$$ 4) $$\frac{720}{640} = \frac{720:80}{640:80} = \frac{9}{8}$$ Ответ: а) 10/59, 59/111, 11/17, 32/7; б) 3/2, 4/27, 5/7, 9/8