A factory produced 1,600 machine parts in March and 1,800 parts in April. How much is the increase in production?
某工厂三月份生产1600个机器零件，四月份生产了1800个零件，增产了百分之几？
<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>