The current price of a commodity is 150 yuan, which is 50 yuan lower than the original price. How much is the decrease?
一种商品现价150元，比原价降低了50元，降低了百分之几？
<gadget id="calculator">150 + 50</gadget>
<output>200</output>

<gadget id="calculator">50 / 200</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>