Milka

Milka has three and seven-sixteenths cm of wire, but she needs only two and five-eighths cm of wire for her laboratory project. Thus, she needs to cut three and seven-sixteenths cm of wire.

Correct answer:

x =  13/16 cm

Step-by-step explanation:

$$\begin{gathered} a=3\frac{7}{16}=3+\frac{7}{16}=\frac{3\cdot 16+7}{16}=\frac{48+7}{16}=\frac{55}{16}=3.4375\text{cm} \\ b=2\frac{5}{8}=2+\frac{5}{8}=\frac{2\cdot 8+5}{8}=\frac{16+5}{8}=\frac{21}{8}=2.625\text{cm} \\ x=a-b=\frac{55}{16}-\frac{21}{8}=\frac{55}{16}-\frac{42}{16}=\frac{55-42}{16}=\frac{13}{16}=\frac{13}{16}\text{cm}=0.8125\text{cm} \end{gathered}$$

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