If a real estate agent sells a house of 800,000 yuan for 1.2 million yuan, then the profit rate = what.
房产商将一套80万元的房子以120万元卖出，则盈利率=多少．
<gadget id="calculator">120 - 80</gadget>
<output>40</output>

<gadget id="calculator">40 / 80</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>