Calculate the final ownership for XYZ if he raises $12 million at $6 million pre-money , as opposed to the following in two -year increments : 2 $million at $4 million pre- money?

Quick numerical question

Calculate the final ownership for XYZ if he raises $12 million at $6 million pre-money , as opposed to the following in two -year increments : 2 $million at $4 million pre- money?