User:TortoiseWrath/Boxen/Percentage
Call userbox as thus: {{User:TortoiseWrath/Boxen/Percentage|birth|wikipedianism}} where birth is date of birth (eg. 1968-05-21) and wikipedianism is date of first edit (eg. 2004-03-12).
| 37% | This user has been a Wikipedian for 36.6% of their life. |