The current price of a coat is 320 yuan, which is 80 yuan lower than the original price. How much is this coat lower than the original price?
一件大衣现价320元，比原价降低了80元，这件大衣比原来降低了百分之几？
<gadget id="calculator">320 + 80</gadget>
<output>400</output>

<gadget id="calculator">80 / 400</gadget>
<output>1/5 = around 0.2</output>

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