A workshop needs to produce 160 parts, 40 of which have been completed, how much of the total number of parts has been completed.
某车间要生产160个零件，已经完成了40个，完成的占总数的多少．
<gadget id="calculator">40 / 160</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>