Basic College Mathematics (10th Edition)

The box with $0.008$ inch diameter is the green box.
In order to find out which box has a $\frac{1}{125}$ inch diameter, we need to convert the fraction to a decimal. We do this by dividing $1$ by $125$: $~~~~~~~0.008$ $125\overline{)1.000}$ $~~~~~~~~\underline{1~000}$ $~~~~~~~~~~~~~~~0$ We see from the graphic that the box with $0.008$ inch diameter is the green box.