I am trying to explain to a colleague why the sentence:
Additional nine features were added to the dig
I have said you can say "An additional nine features...", "Nine additional features..." instead, but they would like an explanation as of why.
I cannot think of how to explain the grammatical proof of why this is. She says she was taught never to use an article with a plural noun, I was trying to explain that this was not the case here.
Can anyone help explain this in terms of grammar.