The original price of a CD is 8.00 yuan, and the current price is 7.50 yuan. How much is the current price lower than the original price?
一张光盘原价8.00元，现价7.50元．现价比原价降低了百分之几？
<gadget id="calculator">8 - 7.5</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 / 8</gadget>
<output>0.0625</output>

<result>0.0625</result>