I understand the concept of bitcoin days destroyed but on the wiki
https://en.bitcoin.it/wiki/Bitcoin_Days_Destroyed
And the site calculating it
http://abe.bitcoinstats.org:2750/
They give a percentage which is the coin days vs block number. Can someone run me through this calculation.
Block | Age (days) | Coins Created | Avg Coin Age | %CoinDD
210842 | 1430.57 | 10521062.02 | 420.84 | 37.2271%
This was a recent sample from abe and I can't arrive at 37.2271%