After the price of a piece of clothing is reduced by 50 yuan, it is sold for 200 yuan, how much is the reduction?
一件衣服降价50元后，售200元，降幅多少．
<gadget id="calculator">50 + 200</gadget>
<output>250</output>

<gadget id="calculator">50 / 250</gadget>
<output>1/5 = around 0.2</output>

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