Выполните действия:(5 1/3-8):1 7/9/(2 5/9-3 2/3)•0,45=

(5 1/3 - 8) : 1 7/9 : (2 5/9 - 3 2/3) * 0,45 = 0,675. 

1). 5 1/3 - 8 = 5 1/3 - 7 3/3 = -2 2/3;

2). 2 5/9 - 3 2/3 = 23/9 - 11/3 = 23/9 - (11*3)/(3*3) = 23/9 - 33/9 = -10/9 = -1 1/9;

3). -2 2/3 : 1 7/9 = -8/3 : 16/9 = -8/3 * 9/16 = -(8 * 9)/(3 * 16) = -72/48 = -36/24 = -18/12 = -3/2 = -1 1/2; 

4). -1 1/2 : ( -1 1/9) = -3/2 : (-10/9) = 3/2 : 10/9 = 3/2 * 9/10 = (3 * 9)/(2 * 9) = 27/18 = 3/2 = 1 1/2; 

5). 1 1/2 *0,45 = 3/2 * 45/100 = 3/2 * 9/20 = (3 * 9)/(2 * 20) = 27/40 = 0,675. 

Ответ: 0,675.