From home to the library, Dad takes 8 minutes and Xiao Ming takes 10 minutes. How much faster is Dad's speed than Xiao Ming?
从家到图书馆，爸爸要8分钟，小明要10分钟，爸爸的速度比小明快百分之几？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/8) - (1/10)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(1/40) / (1/10)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>