mysql - SQL select percentage -

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i have 2 tables in mysql hold users , 1 holds there subscriptions. there users may sign not subscribe. use following query count of users have not subscription:

select count(social_users.id) social_users left join socials on social_users.id = socials.social_user_id socials.social_user_id null

the above query works fine , return number count of users have no subscription.

now, want there percentage relative total number of users. tried make 2 count sql queries , divide them follows:

(select count(social_users.id) social_users left join socials on social_users.id = socials.social_user_id socials.social_user_id null) / select count(social_users.id) social_users

however, query not work. need know other way allow me embed 2 select , divide them , multiply result 100.

try this

   select ( (select count(social_users.id) social_users left join socials on     social_users.id = socials.social_user_id socials.social_user_id     null) / (select count(social_users.id) social_users))*100 percentage

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