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My cupcake recipe makes 12 cupcakes and requires 2 sticks of butter. I can only buy whole sticks of butter. How many whole sticks of butter must I buy to make 200 cupcakes?

 Sep 15, 2021
 #1
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So if 2 sticks of butter make 12 cupcakes... and we set the number of cupcakes as c and the number of sticks of butter as b, we get

12c = 2b

dividing each side by 2 we get

6c = 1b

Since we need 200 cupcakes, we divide 200 by 6 and get 33.3, which we round up because we need 200 cupcakes or more

so we multiply the equation 6c = 1b by 34, and get 34 sticks of butter

 

:)

 Sep 15, 2021
 #2
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2 b / 12 * 200 c = 33.33 b     ~~ 34 sticks of b utter    ( notice how the 'c' cancels out and you are left with b utter)

 Sep 15, 2021

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