К числу в рамке 1/2 прибавь каждое числи в столбце:
+1/5
+4/5
1/8
1 1/3
1/9
1/3
1/2
2/3
2 1/6
1/7
1/4
2/5
1 1/12
1/10
3/7
К ним всем нужно прибавить 1/2

1/5 + 1/2 = 2/10 + 5/10 = 7/104/5 + 1/2 = 8/10 + 5/10 = 13/10 = 1_3/101/8 + 1/2 = 1/8 + 4/8 = 5/81_1/3 + 1/2 = 1_2/6 + 3/6 = 1_5/61/9 + 1/2 = 2/18 + 9/18 = 11/181/3 + 1/2 = 2/6 + 3/6 = 5/61/2 + 1/2 = 2/2 = 12/3 + 1 /2 = 4/6 + 3/6 = 7/6 = 1_1/62_1/6 + 1/2 =2_1/6 + 3/6 = 2_4/6 = 2_2/31/7 + 1/2 = 2/14 + 7/14 = 9/141/4 + 1/2 = 1/4 + 2/4 = 3/42/5 +1/2 = 4/10 + 5/10 = 9/101_1/12 + 1/2 = 1_1/12 + 6/12 = 1_7/121/10 + 1/2 = 1/10 + 5/10 = 6/10 = 3/53/7 + 1/2 = 6/14 + 7/14 = 13/14