A certain brand of disinfection cabinet is now priced at 400 yuan, which is 100 yuan lower than the original price, and how much is it lower than the original price
某种品牌的消毒柜现在售价400元，比原价降低了100元，比原价降低了多少
<gadget id="calculator">400 + 100</gadget>
<output>500</output>

<gadget id="calculator">100 / 500</gadget>
<output>1/5 = around 0.2</output>

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