In phrase "In letzter Minute"
Why letzt-ER not letzt-EN?
If "in" präposition introduces Dativ, and letzt. is an adjective, than according to adj. declenation, correct form should be "letzten". Can someone explain this to me?
A look in our favourite declension table reveals, you are mistaken.
in letzter Minute
Because Minute is female, it has to be letzter in Dativ. That is because there is no article in this expression. However, you would be correct for
in der letzten Minute
This time, there is an article present. This is known as strong and weak declension.