What are the rules for half, two-thirds, three tenths, four tenths, and five twenty-six?

What are the rules for half, two-thirds, three tenths, four tenths, and five twenty-six?

-6/35
1. Positive and negative Law: one positive and one negative, this is easy
2. Molecular Law: 1,2,3,4,5,6 are also easy
3. Denominator Law: difficulties
2 ,3 ,10 ,15 ,26 ,(35)
2 = 1 square + 1
3 = 2 Square-1
10 = 3 square + 1
15 = 4 Square-1
26 = 5 square + 1
(35) = 6 Square-1