Сократите дроби в задании 5.357.

Сокращаем дроби: a) 6/10 = 3/5, 6/18 = 1/3, 9/15 = 3/5, 9/24 = 3/8; b) 2/12 = 1/6, 3/15 = 1/5, 7/42 = 1/6; c) 12/60 = 1/5, 99/22 = 9/2, 5/100 = 1/20, 20/1000 = 1/50.