Final answer:
The question contained a likely typo in '2 12/8/21 Percent' making it unclear. However, treating each number as a separate option for percentage bonus damage per gold, the possible answers are 2%, 12%, 8%, or 21%.
Step-by-step explanation:
The question seems to be asking for the percentage bonus damage per gold given the value '2 12/8/21 Percent'. It appears to be a mixed figure that contains both a whole number and a fraction followed by another whole number, which can be confusing. To clarify, there is no such legitimate mathematical representation as '2 12/8/21 Percent'. However, if we were to interpret the question as looking for each individual number as a separate percentage, the correct answer must be chosen from the provided options: 1) 2%, 2) 12%, 3) 8%, 4) 21%. Without further context or clarification, we can't determine which number is relevant, but if we are to consider each number as a potential answer, then the percentage bonus damage could be any of the options listed: 2%, 12%, 8%, or 21%.