A tape recorder is now priced at 120 yuan, the original price is 150 yuan, how much will the price be reduced?
一种录音机现在售价是120元，原价是150元，降价多少．
<gadget id="calculator">150 - 120</gadget>
<output>30</output>

<gadget id="calculator">30 / 150</gadget>
<output>1/5 = around 0.2</output>

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