1 5/11  - 2 2/23 * ( 1 3/5 - 2 3/4) = 3 47/55

1) 1 3/5 - 2 3/4 = - 1 3/20

2) 2 2/23 * (-  1 3/20) = - (48/23*23/20) = - 2 2/5

3) 1 5/11 - (- 2 2/5) = 3 47/55