Your ratio is your uploaded amount divided by your downloaded amount.
Example 5GBs uploaded divided by 10GBs downloaded is a (.500) ratio.

These are the new even easier ratio rules:

A download between 20GBs and 30GBs and a ratio below (.050)
will force the tracker to make you seed only until your ratio is above (.050).

A download between 30GBs and 40GBs and a ratio below (.100)
will force the tracker to make you seed only until your ratio is above (.100).

A download between 40GBs and 50GBs and a ratio below (.300)
will force the tracker to make you seed only until your ratio is above (.300).

A download of 50GBs or more and a ratio below (.500)
will force the tracker to make you seed only until your ratio is above (.500).