Zailene

Zailene wants to make two kinds of kakanin, puto and kutsina. Puto recipe needs 3 2/5 cups of flour, while Kutsinta needs 5 ¼ cups of flour. How many cups of flour will Zailene be needed in all?

Correct answer:

x =  8 ¹³⁄₂₀ = 173/20

Step-by-step explanation:

$$\begin{gathered} p=3\frac{2}{5}=3+\frac{2}{5}=\frac{3\cdot 5+2}{5}=\frac{15+2}{5}=\frac{17}{5}=3\frac{2}{5}=3.4 \\ k=5\frac{1}{4}=5+\frac{1}{4}=\frac{5\cdot 4+1}{4}=\frac{20+1}{4}=\frac{21}{4}=5\frac{1}{4}=5.25 \\ x=p+k=\frac{17}{5}+\frac{21}{4}=\frac{68}{20}+\frac{105}{20}=\frac{68+105}{20}=\frac{173}{20}=8\frac{13}{20}=8.65 \end{gathered}$$

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