A piece of goods is priced at 320 yuan and sold at 272 yuan. What is the discount rate for this item.
一件货物定价320元，以272元出售．这件货物的折扣率是多少．
<gadget id="calculator">320 - 272</gadget>
<output>48</output>

<gadget id="calculator">48 / 320</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(3/20) * 1</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>