Помогите решить досконально

2) [((5/8 + 2 17/24) : 2,5) / ((1,3 + 23/30 + 4/11) * 110/401] * 1/2 = 1
Числитель: (5/8 + 2 17/24) : 2,5 = 1 1/3
1) 5/8 + 2 17/24 = 15/24 + 2 17/24 = 2 32/24 = 3 8/24 = 3 1/3
2) 3 1/3 : 2,5 = 10/3 : 25/10 = 10/3 * 10/25 = 100/75 = 1 25/75 = 1 1/3
Знаменатель: (1,3 + 23/30 + 4/11) * 110/401 = 2/3
1) 13/10 + 23/30 = 39/30 + 23/30 = 62/30 = 2 2/30 = 2 1/15
2) 2 1/15 + 4/11 = 2 11/165 + 60/165 = 2 71/165
3) 2 71/165 * 110/401 = 401/165 * 110/401 = 110/165 = 2/3
Числитель/Знаменатель: 1 1/3 : 2/3 = 4/3 * 3/2 = 4/2 = 2
2 * 1/2 = 2/2 = 1 - итог образца

3) [(2 38/45 - 1/15) : 13 8/9 + 3 3/65 * 26/99] / [(18,5 - 13 7/9) * 1/85] = 18
Числитель: (2 38/45 - 1/15) : 13 8/9 + 3 3/65 * 26/99 = 1
1) 2 38/45 - 1/15 = 2 38/45 - 3/45 = 2 35/45 = 2 7/9
2) 2 7/9 : 13 8/9 = 25/9 : 125/9 = 25/9 * 9/125 = 25/125 = 1/5
3) 3 3/65 * 26/99 = 198/65 * 26/99 = (2*2)/(5*1) = 4/5
4) 1/5 + 4/5 = 5/5 = 1
Знаменатель: (18,5 - 13 7/9) * 1/85 = 1/18
1) 18 5/10 - 13 7/9 = 18 45/90 - 13 70/90 = 17 135/90 - 13 70/90 = 4 65/90 = 4 13/18
2) 4 13/18 * 1/85 = 85/18 * 1/85 = 1/18
1 : 1/18 = 1 * 18/1 = 18 - итог образца