The master and the apprentice produced a batch of parts at the same time, the apprentice produced 50, and the master produced 80. By what percentage is the master more productive than the apprentice?
师徒同时生产一批零件，徒弟生产了50个，师傅生产了80个．师傅比徒弟多生产百分之几？
<gadget id="calculator">80 - 50</gadget>
<output>30</output>

<gadget id="calculator">30 / 50</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>