(20 16/25 + 13 9/25) - (23 4/14 + 7 13/14) = 2 11/14
1) 20 16/25 + 13 9/25 = 34
2) 23 4/14 + 7 13/14 = 31 3/14
3) 34 - 31 3/14 = 2 11/14
(20 16/25 + 13 9/25) - (23 4/14 + 7 13/14) = 2 11/14
1) 20 16/25 + 13 9/25 = 34
2) 23 4/14 + 7 13/14 = 31 3/14
3) 34 - 31 3/14 = 2 11/14