Each AA transaction dimension can have several codes on which you assign amounts of specific percentages of the whole amount, in your case, when the AP account is affected with 100, the following transaction codes could be assigned to specific percentages as you mentioned.
Check the following Knowledge Base article for a step by step illustration on how to create the dimension along with the specific percentages.
Steps to set up a GL Transaction Integration with Analytical Accounting in Microsoft Dynamics GP
It's worth mentioning that those values stored under different dimension codes are only recorded for analytical purposes, while the AP account will still be affected with the whole amount 100.
Ms. Susan suggestion is a valid option though, but still AA can be utilized to further enhanced several dimensions and relations for a certain account entry, in order to eliminate the size of Chart of Account mainly and maximize the reporting capabilities.
Your feedback is highly appreciated,