A set of furniture is sold at 3,600 yuan after a price reduction of 400 yuan. How much is the price cut?
一套家具降价400元后以3600元出售，降价了百分之几？
<gadget id="calculator">400 + 3_600</gadget>
<output>4_000</output>

<gadget id="calculator">400 / 4_000</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>