The original price of a commodity is 120 yuan, and the price is reduced by 30 yuan, how much is it reduced.
一件商品原价120元，降价30元，降低了多少．
<gadget id="calculator">30 / 120</gadget>
<output>1/4 = around 0.25</output>

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