The original price of a computer is 4,500 yuan, but now it is sold at a reduced price of 900 yuan. How much is the price cut?
一台电脑原价4500元，现在降价900元出售，降价了百分之几？
<gadget id="calculator">900 / 4_500</gadget>
<output>1/5 = around 0.2</output>

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