The master processes 150 parts, which is 30 more than the apprentice. What percentage is more?
师傅加工零件150个，比徒弟多30个，多了百分之几？
<gadget id="calculator">150 - 30</gadget>
<output>120</output>

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

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