I have 2 modules inside the top-a space.

I would like than the left module the width be 67% and the right module the width be 33%. 2/3 for module left and 1/3 for module right.

How can I change the proportion between this 2 modules on top-a?

Now it is 50% for each module.

Thank you for your attention.

The settings of the module width can be change at:
>> Template Options > Layout > Grid

Problem solved.