Welcome to Half-Life Answers. What would you like to know?

i think its 200yrs because 12.5%x4 =50% which is equal to the 800 years of its half life. by this you can divide 4 by 800 which equals 200 so thats 12.5% OF 800


Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.