Calculation of percentage of group count(*)

Question

Select * from Namelist;
Name      Age
Sathish   25
Sathish   65
Sathish   55
Sathish   45
Sathish   35
Jana      55
Jana      25
Jana      10
Bala      55
Bala               


        

Answer 1

select
name,
count(name) as `count`,
count(name)/(select count(*) from namelist)*100 as pct
from namelist
group by name