The master and the apprentice process a batch of parts at the same time, a total of 450 parts are processed in 5 hours, the master processes 55 parts per hour, how many parts are processed by the apprentice per hour?
师徒两人同时加工一批零件，5小时共加工450个，师傅每小时加工55个，徒弟每小时加工零件多少个？
<gadget id="calculator">450 / 5</gadget>
<output>90</output>

<gadget id="calculator">90 - 55</gadget>
<output>35</output>

<result>35</result>