To determine how many cakes Edith needs to make, we first calculate how many pieces of cake are needed in total.
If each of the 18 guests receives 2/3 of a cake, then the total amount of cake needed is:
18 guests * 2/3 cake per guest = 12 cakes
Therefore, Edith needs to make 12 cakes for her party.
Edith is throwing a party and invites 18 guests. Every guest gets 2/3 of a cake each. How many cakes does she need to make?
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