Due to the speeding up of the train, it used to take 10 hours from Shanghai to Xuzhou, but now it only takes 8 hours, which is much faster than before.
由于火车提速，原来上海到徐州要10小时，现在只要8小时，速度比原来提高了多少．
<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>