From the statement of the problem, we know that the organizer has the following guests:
• 12 cousins,
,
• 6 aunts,
,
• 4 brothers,
,
• 2 sisters.
The total number of guests is 12 + 6 + 4 + 2 = 24. A 25% of the total number of guests is 0.25*24 = 6 guests. Because the group of aunts has 6 members, that group represent 25% of her guest.
Answer
The group of 6 aunts represents 25% of her guests.