In a factory, Master Zhang processed a batch of parts. On the first day, he processed 48 parts. On the second day, he processed 25% more than the first day. On the third day, he processed 5% less than the second day. The batch was completed in three days. 55% of the parts, how many parts are there in this batch?
某工厂由张师傅加工一批零件，第一天加工了48个，第二天比第一天多加工了25%，第三天比第二天少加工了5%，三天共完成这批零件的55%，这批零件共有多少个．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">48 * (5/4)</gadget>
<output>60</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">48 * (5/4) * (19/20)</gadget>
<output>57</output>

<gadget id="calculator">48 + 60 + 57</gadget>
<output>165</output>

<gadget id="calculator">55 / 100</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">165 / (11/20)</gadget>
<output>300</output>

<result>300</result>