A factory processes a batch of parts. It processed (3/8) of the total number of parts in the first month, and processed (1/4) of the number of parts in the second month. What percentage of the parts are left unprocessed?
某工厂加工一批零件，第一个月加工了零件总数的(3/8)，第二个月加工了零件个数的(1/4)，还剩下几分之几没有加工？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">1 - (3/8) - (1/4)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>