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Butoxors [25]
3 years ago
6

when I make macaroni and cheese for my brother and me, I use 2 2/3 tablespoons of butter. how much butter will I n need to make

my macaroni and cheese dish for Thanksgiving dinner if 15 people are attending?
Mathematics
2 answers:
vladimir2022 [97]3 years ago
8 0
You would need about 34  2/3 tablespoons of butter. Convert the fraction into an improper fraction, so 8/3. Then multiply that by 13 (you and your brother are included in the 15 people I suppose) and you get 104/3. Simplify that to get a mixed number and you have 34  2/3.
Allushta [10]3 years ago
5 0
If you use 2 2/3 tablespoons for you and your brother, that means, you need 2 2/3 tablespoons for two servings, how many tablespoons for 15 servings then?

well  \bf 2\frac{2}{3}\implies \cfrac{2\cdot 3+2}{3}\implies \cfrac{8}{3}\\\\
-------------------------------\\\\
\begin{array}{ccllll}
\textit{butter spoons}&servings\\
-----&-----\\
\frac{8}{3}&2\\
x&15
\end{array}\implies \cfrac{\frac{8}{3}}{x}=\cfrac{2}{15}\implies \cfrac{\frac{8}{3}}{\frac{x}{1}}=\cfrac{2}{15}
\\\\\\
\cfrac{8}{3}\cdot \cfrac{1}{x}=\cfrac{2}{15}\implies \cfrac{8}{3x}=\cfrac{2}{15}\implies 8\cdot 15=3x\cdot 2\implies 120=6x
\\\\\\
\cfrac{120}{6}=x\implies 20=x
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