There is a refrigerator, the original price is 2,000 yuan, and the price is reduced to 1,600 yuan. What percentage is the reduction?
有一台冰箱，原价2000元，降价后卖1600元，降了百分之几？
<gadget id="calculator">2_000 - 1_600</gadget>
<output>400</output>

<gadget id="calculator">400 / 2_000</gadget>
<output>1/5 = around 0.2</output>

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