How effective is plan b when taken immediately after condom breaking?

Plan B: If you take Plan B less than one day after a condom breaks, it is 95% effective, 89% if you take it in less than three days

Plan B: Plan B One-Step is up to 89 % effective when taken within 72 hours (3 days) after unprotected sex. It can reduce chance of pregnancy by up to 95% if used within 24 hours. It continues to reduce the risk of pregnancy up to 120 hours (5 days) after unprotected sex, but is less effective as time passes.