After the price of an MP4 is reduced by 50 yuan, it will be sold at 450 yuan. How much will the price be reduced?
一部MP4降价50元后，按450元出售，降价多少
<gadget id="calculator">450 + 50</gadget>
<output>500</output>

<gadget id="calculator">50 / 500</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>