Final answer:
Many large corporations form PACs to distribute money to candidates, representing business-related interests. PACs are limited in the amount of money they can contribute to candidates or national party organizations.
Step-by-step explanation:
The percentage of PACs that represent business-related interests can vary. However, many large corporations form PACs to distribute money to candidates. For example, in the most recent election cycle, corporations and associations donated large amounts of money to Democratic and Republican candidates through affiliated PACs. It is important to note that PACs are limited in the amount of money they can contribute to individual candidates or national party organizations.