2 rows with 3 columns in each to 3 rows with 2 columns?

We are building a site using and on part is “2 rows with 3 columns in each” and on tablet I would like it to be 3 rows with 2 columns in each. But how do I set this up? is there a clever way to solve the problem.
If I just use it like above and set the columns to be 50% at tablets I get 2 + 1 + 2 + 1 + 2.
I can make multiple rows and hide them on the different screen resolution but is there a better way?