The current price of a color TV set is 2,100 yuan, which is 400 yuan lower than the original price. How much is the price cut?
一种彩电现价每台2100元，比原来降低了400元．降价百分之几？
<gadget id="calculator">2_100 + 400</gadget>
<output>2_500</output>

<gadget id="calculator">400 / 2_500</gadget>
<output>4/25 = around 0.16</output>

<result>4/25 = around 0.16</result>