Section Responsive

[qwerty]

I have a website with some section that full width contains 4 column.
Less than a certain width, it no longer looks good and I want only 3 to be displayed. The problem is I can not get to it.
I have a good size definition on a tablet for example that it's only 2,
How can I do this so that between a certain width range, there will be only 3 columns?

 

[M1NT]

Change to mobile or tablet view and change the width % of the columns.