What am I?

Question:

What am I?

My grandfather is from spain on my dads side.
My grandmother is from mexico on my dads side.
My granfather is from italy on my mums side.
My grandmother is from mexico on my mums side.
Both my parents were born in mexico.
I was born in the US.
What is my heratige %?
For example, 20% mexican 80% japanese.

Best Answer - Chosen by Asker: 50% Mexican
25% Spanish
25% Italian

Father = 50% Spain, 50% Mexico
Mother = 50% Italian, 50% Mexico

Rule of Thumb here: if 2 different races mix, cut each in half and give to the child. if 2 of the same race mix, give 100% of that race to the child. In this case:

50% Spanish + 50% Italian = 25% Spanish, 25% Italian
50% Mexican + 50% Mexican = 50% Mexican