1) (5 3/5 - 1 1/3) : (7 7/12 - 2

1) (5 3/5 - 1 1/3) : (7 7/12 - 2 1/4) * 1,25 = (28/5 - 4/3) : (91/12 - 9/4) * 1,25 = (84/15 - 20/15) :

: (91/12 - 27/12) * 1,25 = 64/15 : 64/12 * 1,25 = 64/15 * 12/64 * 1,25 = 15/12 * 1,25 = 1,25 * 

* 1,25 = 1,5625;

2) (3 3/4 * 3/5 - 7 1/2 : 27 + 1 2/9) : (3 1/6 - 1 1/4) = (15/4 * 3/5 - 15/2 : 27 + 11/9) : (19/6 -

- 5/4) = (3/4 * 3/1 - 15/2 * 1/27 + 11/9) : (38/12 - 15/12) = (9/4 - 5/2 * 1/9 + 11/9) : 23/12 =

= (9/4 - 5/18 + 11/9) : 23/12 = (81/36 - 10/36 + 44/36) : 23/12 = 115/36 : 23/12 = 115/36 *

* 12/23 = 5/3 * 1/1 = 5/3 = 1 2/3.