- Your sister is English?
- Oh, she's half English, half American. Half sister, really, so that makes her about an eighth English. I don't know. I've never really done the math.

10 seconds sound clip from the Mrs. Doubtfire movie soundboard.

You can hear this line at 00:46:46 in the Blu-ray version of the movie.

Quote context

[...]

(Rat Trap)

- Mrs. Sellner! How are you? Always a joy. If you wanted some cheese, why didn't you just say so?

- Well, I know you'll be happy to know that I now am holding down two jobs... One for an educational film and TV company... Heavy responsibility.

- And the other?

- Cleaning houses.

- Not mine.

- Oh. Big girl.

- Your sister is English?

- Oh, she's half English, half American. Half sister, really, so that makes her about an eighth English. I don't know. I've never really done the math.

- You see, my father was American. He, uh, flew for the English during the war. He was in London and met this lovely Englishwoman.

- Well, my sister was the fruit of their passions.

(Mrs. Sellner screams)

- Sorry. My sister's, not yours.

[...]