One kind of parts is reduced from 80 yuan per piece to 48 yuan. How much is the reduction?
一种零件，由原来每件80元，降低到48元，降低了百分之几？
<gadget id="calculator">80 - 48</gadget>
<output>32</output>

<gadget id="calculator">32 / 80</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>