A factory planned to produce 120 parts, but actually produced 150. What percentage increase in production?
某工厂计划生产120个零件，实际生产了150个，增产百分之几？
<gadget id="calculator">150 - 120</gadget>
<output>30</output>

<gadget id="calculator">30 / 120</gadget>
<output>1/4 = around 0.25</output>

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