I'm pale white but ancestry test says 40% indigenous, isn't that a lot?

I know my family is full of mixtures but isn't 40% Native American (indigenous) a lot for a pale, white woman? I really thought I was Caucasian due to my pale skin and natural red hair.

My maternal great-grandma's picture was just discovered. It isn't just my family members but friends are saying I look like the exact white version of her, her facial features and my straight hair. She was Native American.

I was taken by surprise to be honest. 40% is a lot.

I'm pale white but ancestry test says 40% indigenous, isn't that a lot?
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