The original price of a commodity is 80 yuan, and the current price is 64 yuan. How much has the price been reduced?
一种商品原价80元，现价64元，降价了多少．
<gadget id="calculator">80 - 64</gadget>
<output>16</output>

<gadget id="calculator">16 / 80</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>