Explanation was incorrect. It is not the % of your holed putts coming from that range.
It the number of putts holed from that range - as a % of all putts attempted from any range.
So that number should add up your total conversion rate of all putts.
You can check this against the 1-putt, 2-putt, 3 or more stat approximately
Say I have 60% 1-putts, 36% 2-putts, and 4% 3 or more. For 100 holes I'd be taking 60 putts for my 1-putts, 36 x 2 = 72 putts for my 2-putts, and 3 x 4 = 12 putts on my 3 or more (assuming I have done no worse that a 3-putt). This equals 144 putts in total -- and obviously I holed 100 of them (for 100 holes) -- so my conversion rate is 100/144 = 69.4%
Then you can add up the % holed from each range - it should come close to this conversion rate.
At least this is how it is supposed to work - these stats have been reported as glitchy in their maths for years now. Whenever I do these calcs - the 2nd set add up to about 1% or so more than the 1st calculation.