The current price of a mobile phone is 800 yuan, which is 200 yuan lower than the original price. How much is the price reduction?
一部手机现价是800元，比原价降了200元，降价了百分之几？
<gadget id="calculator">800 + 200</gadget>
<output>1_000</output>

<gadget id="calculator">200 / 1_000</gadget>
<output>1/5 = around 0.2</output>

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