car sold for 150,000 yuan last year and 120,000 yuan this year. How much has the price of this car dropped.
一种汽车，去年每辆售价15万元，今年每辆售价12万元．这种汽车的价钱降低了多少．
<gadget id="calculator">15 - 12</gadget>
<output>3</output>

<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

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