two-third cup of butter / two-thirds cup of butter

Which is correct, two-third cup of butter or two-thirds cup of butter?

The second.

For me, neither is correct.

... two-thirds of a cup of butter.

emsr2d2 said:

For me, neither is correct.

... two-thirds of a cup of butter.

Click to expand...

In a recipe, this would be written "⅔ cup butter" or "butter, ⅔ cup".

emsr2d2 said:

For me, neither is correct.

... two-thirds of a cup of butter.

Click to expand...

2 2/3 cups all-purpose flour (quoted from a recipe)
How should I read the above ingredient?

sitifan said:

2 2/3 cups all-purpose flour (quoted from a recipe)
How should I read the above ingredient?

Click to expand...

I'd say Two and two-thirds cups all-purpose flour.

And if you read it aloud, "Two and two-thirds cups of all-purpose flour".

I'd be more likely to read it aloud as it's written, without "of".

Maybe that's another AmE/BrE difference then. We tend to add implied words when we read aloud.

Written: I was born on April 23rd.
Spoken: I was born on April the twenty-third.

Written: 1 1/2 cups flour
Spoken: One and a half cups of flour.