The fuel

The car's fuel was ¾ full at the beginning of the week. At the end of the week, there was ⅛ of a tank left.
a. Did the car use more or less than ½ of a fuel tank? How do you know?
b. How much more or less than ½ of a tank did it use?
Show your work using the model of the counter.

Result

a=

Yes

No

b =  1/8

Step-by-step explanation:

$$\begin{gathered} V_1=\frac{3}{4}=0.75 \\ {V}_2=\frac{1}{8}=0.125 \\ x=V_1-V_2=\frac{3}{4}-\frac{1}{8}=\frac{6}{8}-\frac{1}{8}=\frac{6-1}{8}=\frac{5}{8}=0.625 \\ x>1/2 \\ a=1 \end{gathered}$$

$b=x-\frac{1}{2}=\frac{5}{8}-\frac{1}{2}=\frac{5}{8}-\frac{4}{8}=\frac{5-4}{8}=\frac{1}{8}=0.125$

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