They have to multiply the amount of people by 5 because 60÷12=5 meaning you'll have to do the same to the 4 which will make it 20 potatoes. Hope this helps! :)
4 potatoes serve a party of 12
Divide 12 with 4
12/4 = 3
1 potato serves 3 people.
There are 60 people.
Divide 60 with 3
60/3 = 20
20 potatoes are needed to serve 60 people.
hope this helps
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