46t with 16 cog = 2.88.
46t with 17 cog = 2.71.
I don't think I've ever seen a gear chart like that - it's information is woefully incomplete because it doesn't take account of the wheel size.
Personally, I like the English system of stating a gear in inches because that's how I've always thought of gearing, and because it gives an easy to remember set of numbers. For example 46 x 18 (the traditional British utility bike gear) is 66 with 26" wheels, but 69 with 27's - a significant difference (n.b. 700's are in between and vary according to the tyre size, but can be taken as about 26.5).
In these days of calculators gear charts are unnecessary - all you do is to divide the no. of teeth on the front by those on the back and multiply by the wheel size, preferably in inches ! I can remember people laboriously working out these sums with pencil and paper using long division.
I know the continental system of 'development' is more rational, but it doesn't give a memorable set of numbers. I think it's quite possible to be able to feel the difference between 66 and 69, especially into a head wind.
I've another comment to make, but it's now stopped raining so I'm going out on my bike - more later.