The price of the washing machine has dropped from 800 yuan to 720 yuan per machine. By what percentage has the price been reduced?
洗衣机的价格从每台800元降到每台720元，价格降低了百分之几？
<gadget id="calculator">800 - 720</gadget>
<output>80</output>

<gadget id="calculator">80 / 800</gadget>
<output>1/10 = around 0.1</output>

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