User blog comment:Yunhua98/Quarter Bloods/@comment-3146930-20120322201338/@comment-3146930-20120322202126

So a child of two demigods could be (using Poseidon and Athena to fit the example): 1/2 human + 1/4 Athena + 1/4 Poseidon 1/2 human + 1/8 Athena + 3/8 Poseidon 1/2 human + 3/8 Athena + 3/8 Poseidon 3/4 human + 1/8 Athena + 1/8 Poseidon 4/4 human + 0/4 Athena + 0/8 Poseidon

And pretty much any other fraction