Aperture Adjustment Ratio

Under this link: Stencil Aperture Adjustment ambiguous data is provided. The text states the opening will be shrunk by (1-0.13)², but the image states it will be shrunk by (1-0.15)². Which one is the actual value being used?

I need to make sure some stencil openings are manufactured in exactly the right size, and want to enlarge my apertures, so they are correct after shrinking.

Many thanks and best regards
Joel