The price of a tape recorder is reduced from 220 yuan to 120 yuan, by how much? What is the correct column
一种录音机，每台售价从220元降低到120元，降低了百分之几？正确的列式是多少
<gadget id="calculator">220 - 120</gadget>
<output>100</output>

<gadget id="calculator">100 / 220</gadget>
<output>5/11 = around 0.454545</output>

<result>5/11 = around 0.454545</result>