Aren’t the statements “A lower ratio means most of the orders are reorders. A higher ratio means more of the orders are first purchases” on the contrary?
More people in the denominator (lower ratio) means more people first ordering. And less people in the denominator (higher ratio) means more people reordering, no?
I agree. I think the explanation is incorrect and I think the best way for this to be fixed is for people to notice it and submit bug reports about the exercise.