SQLZoo:Percentages of Germany

Germany (population 80 million) has the largest population of the countries in Europe. Austria (population 8.5 million) has 11% of the population of Germany.

Show the name and the population of each country in Europe. Show the population as a percentage of the population of Germany.

The format should be Name, Percentage for example:

name percentage
Albania 3%
Andorra 0%
Austria 11%

select name,concat(round(( 100* population /
 (select population from world  where name = 'Germany')),0),'%') 
as pecent from world where continent='Europe';