A workshop produces 1,600 parts in March and 1,800 parts in April. What percentage is the increase in April compared to March?
某车间三月份生产1600个零件，四月份生产1800个零件，四月份比三月份增产百分之几？
<gadget id="calculator">1_800 - 1_600</gadget>
<output>200</output>

<gadget id="calculator">200 / 1_600</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>