Starting at 100%, after 704 million years 50% will be left, after another 704 million years nothing will be left.

Starting at 100%, after 704 million years 50% will be left, after another 704 million years 25% would be left.

Starting at 100%, after 5730 years 50% will be left, after another 5730 years nothing will be left.

Starting at 100%, after 5730 years 50% will be left, after another 5730 years 25% would be left.