commodity, from the original 96 yuan down to 84 yuan. By what percentage?
一件商品，由原来的96元降到了84元．降低了百分之几？
<gadget id="calculator">96 - 84</gadget>
<output>12</output>

<gadget id="calculator">12 / 96</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>