Plugin to divide page into columns with % width? (25%, 50%, 75%, 100%)

Hey guys,

I downloaded a theme a while back which allowed me to add columns to a page and change the width based on percentages. However, outside of this theme, I haven’t found a plugin which would allow me to do this on my custom themes.

Does anyone know if one exists?

Here’s a screenshot for better clarification: https://i.imgur.com/NsdyT.jpg

Thanks!