(7-1 5/9 : 7/24) : 20/27

1) 1 5/9 : 7/24 = 14/9 * 24/7 = 16/3=5 1/32) 7 - 5 1/3 = 1 2/33) 1 2/3 : 20/27 = 5/3 * 27/20 = 9/4 = 2 1/4ответ: 2 1/4