Rachel 3

Rachel has 1 cup of cinnamon. She makes cinnamon rolls from a recipe that calls for 1/8 of a cup of cinnamon per batch. If she makes 3 batches, how much cinnamon will she have left?

Correct answer:

x =  5/8

Step-by-step explanation:

$$\begin{gathered} a=1 \\ b=3\cdot \frac{1}{8}=\frac{3\cdot 1}{8}=\frac{3}{8}=0.375 \\ x=a-b=1-\frac{3}{8}=\frac{1\cdot 8}{8}-\frac{3}{8}=\frac{8}{8}-\frac{3}{8}=\frac{8-3}{8}=\frac{5}{8}=0.625 \end{gathered}$$

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