11/4500 = 0.00244
0.00244 x 100 = 0.24%
When I joined this religion in the ‘80s the baptisms were always 1 - 3% of the attendance at conventions and assemblies. Always.
I clearly remember a dozen years or so ago at an assembly of about 1,500 in a suburban area in California where no one got baptized. No one.
Several of the long time elders were shocked and visibly disturbed.