A baker 4

A baker has 20 cups of flour. If a loaf of bread requires 3 1/3 cups of flour and the baker made 4 loaves, how many cups of the flower were left over?

Correct answer:

x =  6 ²⁄₃ = 20/3

Step-by-step explanation:

$$\begin{gathered} a=20 \\ b=3\frac{1}{3}=3+\frac{1}{3}=\frac{3\cdot 3+1}{3}=\frac{9+1}{3}=\frac{10}{3}=3\frac{1}{3}\doteq 3.3333 \\ n=4 \\ c=n\cdot b=4\cdot \frac{10}{3}=\frac{4\cdot 10}{3}=\frac{40}{3}\doteq 13.3333 \\ x=a-c=20-\frac{40}{3}=\frac{20\cdot 3}{3}-\frac{40}{3}=\frac{60}{3}-\frac{40}{3}=\frac{60-40}{3}=\frac{20}{3}=6\frac{2}{3}=6.6667 \end{gathered}$$

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