Does this equal 1/16?

Question

I went back through my tree about my Irish blood (seeing as a whole line of people have been asking if there own Irish blood counts) and I found that both of my great grandparents on my grandfather's side were 1/4 Irish, so they would make my grandfather 1/4 right? Then my mom would be 1/8 and I would be 1/16 Irish plus the very very little Irish on my grandmother's side?

So then I would be 1/16 Irish(Plus what little I got from my grandmother's side and what amount is from my dad's side), right?

Answer 1

your grandfather would be full irish (because you only know that your grandfather's parents were both irish), making your mother 1/2 irish, making you 1/4 irish + what you have from your grandmother

Answer 2

You are 1/16 Irish. Congratulations! But what about the other 15 parts?

Answer 3

You are correct.