The original price of the induction cooker is 400 yuan, and the current price is 320 yuan. How much has the price of the induction cooker been reduced?
电磁炉原价是400元，现价320元，电磁炉的价格降低了多少．
<gadget id="calculator">400 - 320</gadget>
<output>80</output>

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

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