What happens after a bill is passed in congress?

They ask the president to sign it and if he dissagrees(or vetos it), they have to get a ceirtian precentage to have it passed. After they get the president to sign itso it can be passed, but if he vetos it than the congrass votes on if the bill should be passed or not. i think they have to get 3/4(voting twards the vote) to pass it.